Chapter 3

1. Female External Reproductive Structures

• External genitalia / vulva: The visible female reproductive structures extending from the pubis to the perineum. Appearance varies among individuals and can be influenced by heredity, age, race, and previous births.

• Mons pubis: A fatty pad covering the anterior surface of the symphysis pubis; after puberty, it is usually covered by coarse pubic hair.

• Symphysis pubis: The cartilaginous joint at the front of the pelvis, located beneath the mons pubis.

• Labia majora: Two rounded, highly vascular outer folds of fatty tissue and skin that extend from the mons pubis and protect the inner vulvar structures; their outer surfaces develop hair after puberty.

• Labia minora: Two inner folds visible when the labia majora are separated; contain sensitive nerve endings, sebaceous follicles, and some sweat glands but no hair follicles.

• Prepuce: The hoodlike covering over the clitoris, formed where the labia minora join anteriorly.

• Frenulum: The fold of tissue beneath the clitoris.

• Clitoris: A small, highly sensitive structure composed of erectile tissue and numerous sensory nerve endings; it enlarges during sexual arousal.

• Vaginal vestibule: The almond-shaped area enclosed by the labia minora that contains openings to the urethra, Skene glands, vagina, and Bartholin glands.

• Urethral opening / urinary meatus: The opening of the urethra within the vestibule, usually approximately 2.5 cm below the clitoris. The urethra is part of the urinary system, not a reproductive organ.

• Skene glands: Glands located on each side of the urethra that produce mucus contributing to vaginal lubrication.

• Vaginal opening / vaginal orifice / introitus: The opening into the vagina in the lower portion of the vestibule; its size and shape vary.

• Hymen: A connective-tissue membrane around the vaginal opening that may be perforated by strenuous exercise, tampon insertion, masturbation, or vaginal intercourse.

• Bartholin glands: Glands located posteriorly on either side of the vaginal opening that secrete clear mucus during sexual arousal to lubricate the vaginal introitus.

• Fourchette: A thin, flat tissue fold formed where the labia minora join beneath the vaginal opening.

• Perineum: The skin-covered muscular area between the fourchette and anus; covers and supports pelvic structures.

• Perineal body: A wedge-shaped mass at the base of the perineum that anchors pelvic muscles, fascia, and ligaments.

Vagina

• Location: A collapsible fibromuscular tube between the bladder and rectum that extends from the vulva to the uterus.

• Functions: Provides a passageway for menstrual flow, serves as a female organ of copulation, and forms part of the vaginal birth canal.

• Rugae: Transverse folds in the vaginal mucosa that permit expansion during birth.

• Fornices: Anterior, posterior, and lateral recesses surrounding the cervix at the upper end of the vagina.

• Estrogen-related changes: Reduced estrogen after birth, during lactation, or at menopause can cause vaginal dryness, thinning of vaginal walls, and smoothing of rugae.

Uterus and cervix

• Uterus: A muscular, inverted-pear-shaped organ located between the bladder and rectum; receives and supports a fertilized ovum, nourishes the developing fetus, contributes to birth, and undergoes cyclic menstruation.

• Corpus: The upper, triangular body of the uterus.

• Fundus: The rounded, dome-shaped top of the uterus where the uterine tubes enter.

• Isthmus / lower uterine segment: The narrow region between the uterine corpus and the cervix.

• Cervix: The lower cylindrical portion of the uterus that connects with the vagina; its fibrous and elastic tissue permits stretching during vaginal birth.

• Internal os: The opening between the uterine cavity and the endocervical canal.

• External os: The opening between the endocervical canal and the vagina.

• Endometrium: The highly vascular inner uterine lining. Its outer functional layers thicken during the cycle and are shed during menstruation; the basal layer remains and supports regeneration.

• Myometrium: The uterine smooth-muscle layer; its fibers contribute to fetal expulsion and control of blood loss after birth.

• Cul-de-sac of Douglas: A deep recess posterior to the cervix.

Uterine tubes and ovaries

• Uterine / fallopian tubes: Structures connecting the region of the ovaries with the uterus and providing a passageway for the ovum.

• Infundibulum and fimbriae: The infundibulum is the part of the tube nearest the ovary; its fringed fimbriae help draw the ovum into the tube.

• Ampulla: A middle section of the uterine tube and the usual site where sperm fertilizes the ovum.

• Ovaries: Paired almond-shaped organs that release mature ova and produce estrogen, progesterone, and androgen.

• Ovum / oocyte: The reproductive cell that matures within an ovarian follicle and may be released during ovulation.

• Follicle / graafian follicle: An ovarian structure containing a developing oocyte; a mature follicle releases the ovum at ovulation.

• Corpus luteum: The structure formed from the emptied follicle after ovulation; produces progesterone and some estrogen during the luteal phase.

Bony pelvis and clinically useful landmarks

• Functions: Protects pelvic organs, accommodates the growing fetus, and anchors pelvic support structures.

• Pelvic bones: Two innominate or hip bones, the sacrum, and the coccyx. Each hip bone consists of the ilium, ischium, and pubis.

• Ilium: The broad upper portion of the hip bone.

• Ischium: The lower posterior portion of the hip bone, associated with the ischial spines and ischial tuberosities.

• Pubis: The anterior portion of the hip bone; the pubic bones meet at the symphysis pubis.

• Sacrum and coccyx: Bones forming the posterior part of the pelvis.

• False pelvis: The upper pelvic portion above the pelvic brim or inlet.

• True pelvis: The lower curved bony canal, including the inlet, cavity, and outlet, through which the fetus passes during vaginal birth.

• Ischial spines: Pelvic landmarks at the level of the upper portion of the pelvic outlet.

• Ischial tuberosities: Pelvic landmarks at the level of the lower portion of the pelvic outlet.

• Pubic / subpubic arch: The arch beneath the symphysis pubis at the lower portion of the pelvic outlet.

• Pelvic variation: The chapter relates variation in pelvic size and shape to age, race, and sex; pelvic ossification is described as complete at approximately 20 years of age.

3. Breast Anatomy and Lactation-Related Vocabulary

• Breasts / mammary glands: Paired glands located approximately between the second and sixth ribs. Their functions include lactation and sexual arousal.

• Expected appearance: Breasts are usually similar, though not perfectly symmetrical. A normal contour is smooth without retractions, dimpling, or masses.

• Tail of Spence: An extension of breast tissue toward the axillary region.

• Lobes: Major subdivisions of each mammary gland.

• Lobules: Smaller subdivisions of the lobes consisting of clusters of acini.

• Acini / alveoli: Saclike glandular structures lined with epithelial cells that secrete colostrum and milk.

• Colostrum: A secretion produced by the epithelial cells of the breast acini; the chapter identifies it alongside milk without detailing its composition or timing.

• Myoepithelium: The muscle-containing layer beneath the acinar epithelium that contracts to expel milk from the acini.

• Ductules and ducts: Passages carrying breast secretions from clusters of acini and lobules toward larger ducts and then the nipple.

• Nipple / mammary papilla: The projecting structure where milk ducts converge; contains multiple openings, or nipple pores, through which breast secretions emerge.

• Nipple pores: The openings of milk ducts at the nipple.

• Areola: The wrinkled, pigmented skin surrounding the nipple.

• Montgomery tubercles: Sebaceous glands beneath the areola that secrete a fatty substance believed to lubricate the nipple.

• Cooper’s ligaments: Fibrous suspensory ligaments that separate and support breast glandular structures and ducts while allowing movement on the chest wall.

• Nipple erection: Smooth muscle fibers in the areola contract, making the nipple erect and easier for the breastfeeding infant to grasp.

• Milk pathway: Milk or colostrum is produced in acini, moves into ductules and larger ducts, and exits through openings in the nipple.

Hormonal effects on breast development

• Estrogen: Stimulates breast growth through fat deposition, stromal-tissue development, growth of the duct system, and increased breast vascularity.

• Progesterone: Promotes maturation of mammary gland tissue, especially the lobules and acinar structures.

• Full development: The chapter states that full breast development is not achieved until after the first pregnancy or during early lactation.

• Normal cycle-related changes: Rising estrogen and progesterone before menstruation increase vascularity, enlarge ducts and acini, and promote fluid retention, commonly causing temporary swelling, tenderness, and nodularity.

• Breast awareness: Become familiar with normal breast appearance and feel and promptly report changes; breast activity and tenderness are lowest approximately 5 to 7 days after menstruation stops.

Menstrual Cycle: Overview and Essential Hormones

• Menarche: The first menstrual period.

• Puberty: The broader transition from childhood to sexual maturity.

• Menstruation / menses: Periodic uterine bleeding that occurs when pregnancy has not occurred and the functional uterine lining is shed.

• Typical cycle length: The average cycle lasts approximately 28 days, but normal cycle length varies among individuals.

• Day 1: The first day of menstrual bleeding.

• Typical menstrual flow: The chapter gives an average duration of approximately 5 days, with a usual range of 3 to 6 days.

• Overall purpose: The ovaries mature and release an ovum while the uterine lining is prepared to receive and nourish a fertilized ovum.

• Three synchronized processes: The hypothalamic–pituitary cycle regulates signaling hormones; the ovarian cycle describes follicle growth, ovulation, and corpus luteum activity; the endometrial cycle describes changes in the uterine lining.

Menstrual Cycle: Overview and Essential Hormones - Key hormones and what they do

• Follicle-stimulating hormone (FSH): Released by the anterior pituitary; stimulates ovarian follicles to develop and promotes estrogen production by the developing follicles.

• Estrogen: Produced primarily by developing ovarian follicles during the first part of the cycle; stimulates rebuilding and thickening of the endometrium and supports follicular development.

• Luteinizing hormone (LH): Released by the anterior pituitary; a marked LH surge occurs before ovulation and triggers maturation of the selected follicle and release of the ovum.

• Progesterone: Produced mainly by the corpus luteum after ovulation; supports a thick, vascular, secretory endometrium suitable for implantation.

Follicular / preovulatory phase

• Timing: Begins with the early part of the menstrual cycle and continues until ovulation; its length varies and accounts for most variation in total cycle length.

• Main hormonal signal: FSH stimulates ovarian follicles to develop.

• Ovarian event: Follicles containing immature oocytes begin to mature; a selected follicle develops toward ovulation.

• Estrogen effect: Developing follicles produce estrogen, which stimulates growth and thickening of the uterine lining.

• Clinical connection: The follicular ovarian phase generally corresponds with menstrual shedding followed by the proliferative endometrial phase.

Ovulation

• Meaning: Release of a mature ovum from an ovarian follicle.

• Trigger: A marked LH surge precedes release of the ovum by approximately 24 to 36 hours.

• Timing in a 28-day example: LH peaks near day 13 or 14; ovulation occurs around midcycle. Cycle variation means this is an example rather than a universal fixed day.

• After release: The fimbriae help draw the ovum into the uterine tube, where fertilization usually occurs in the ampulla if sperm is present.

• Possible observations: Cervical mucus becomes thin, clear, and stretchable; the stretchable quality is termed spinnbarkeit. Some individuals notice mittelschmerz, or localized lower abdominal pain, or light spotting.

Luteal / postovulatory phase

• Timing: Begins immediately after ovulation and ends when menstruation begins; usually lasts about 14 days, with a chapter-reported range of 13 to 15 days.

• Ovarian event: The emptied follicle becomes the corpus luteum.

• Dominant hormone: The corpus luteum secretes progesterone and some estrogen.

• Uterine effect: Progesterone maintains a thick, vascular, glandular uterine lining that can support implantation and early nourishment of a fertilized ovum.

• If implantation occurs: The chapter notes that implantation generally takes place approximately 7 to 10 days after ovulation, when the endometrium has become a suitable protective and nutritive bed.

• If implantation does not occur: The corpus luteum regresses, progesterone and estrogen levels fall, and the functional endometrium is shed approximately 2 weeks after ovulation.

• Basal body temperature: Increasing progesterone after ovulation is associated with a rise in basal body temperature.

Four Endometrial Phases: What Happens to the Uterine Lining

• Important distinction: Follicular and luteal are ovarian phases, with ovulation between them. The chapter’s four named phases specifically describe the endometrial cycle.

1. Menstrual phase

• What happens: The functional outer layers of the endometrium are shed as menstrual bleeding.

• Why it happens: If pregnancy does not occur, progesterone and estrogen fall after regression of the corpus luteum, and the prepared lining is no longer maintained.

• What remains: The basal endometrial layer remains in place and provides the cells needed to regenerate the lining.

• Approximate timing: Begins on cycle day 1 and averages approximately 5 days.

2. Proliferative phase

• What happens: The endometrium regenerates and rapidly thickens after menstruation.

• Primary hormone: Estrogen produced by developing ovarian follicles.

• Approximate timing: From approximately day 5 until ovulation.

• Purpose: Rebuild a healthy uterine lining before release of the ovum.

3. Secretory phase

• What happens: The endometrium becomes thick, vascular, edematous, and rich in glandular secretions.

• Primary hormone: Progesterone produced by the corpus luteum after ovulation.

• Approximate timing: Extends from ovulation until approximately 3 days before the next menstrual period.

• Purpose: Provide a protective, nutritive environment suitable for implantation of a fertilized ovum.

4. Ischemic phase

• What happens: The endometrium enters the final premenstrual stage shown in the chapter’s menstrual-cycle diagram as ovarian hormone levels decline and the lining transitions toward shedding.

• Hormonal context: If fertilization and implantation do not occur, regression of the corpus luteum reduces progesterone and estrogen support.

• Clinical connection: Loss of hormonal support is followed by shedding of the functional endometrium and the start of another menstrual phase.

Putting a typical 28-day cycle together

• Around days 1–5: Menstrual bleeding occurs while the next group of ovarian follicles begins developing under FSH stimulation.

• Around days 5–14: Follicles mature, estrogen rises, and the endometrium proliferates or thickens.

• Around days 13–14: An LH surge precedes ovulation and release of the ovum.

• After ovulation: The corpus luteum produces progesterone; the endometrium enters its secretory phase and is maintained for possible implantation.

• Late in the cycle if pregnancy does not occur: The corpus luteum regresses, progesterone and estrogen fall, the endometrium enters its ischemic phase, and menstruation begins again.

7. Understanding the Whole Person

• Holistic nursing perspective: The chapter describes the patient as a biological, psychological, social, and spiritual person whose health needs extend beyond reproductive anatomy.

• Health promotion: Support actions that improve well-being and help the person reach her health potential.

• Illness prevention: Help prevent illness, identify problems early, and maintain the best possible functioning when illness is present.

• Individualized care: Assess physical health together with emotional well-being, social circumstances, family relationships, personal beliefs, available support, and environmental risks.

Support systems and engagement with care

• Strong support: Family, partners, friends, community resources, and support groups can improve coping, self-esteem, confidence, and the ability to manage stress.

• Knowledge and participation: A patient’s readiness to learn, access to understandable information, and involvement in health decisions can support prevention and effective self-management.

• Nursing approach: Ask about available family or social support, identify learning needs and concerns, encourage questions, and connect the patient with helpful resources.

Age and developmental circumstances

• Adolescence: Developmental tasks, limited experience, misinformation, financial dependence, stress, pregnancy, sexually transmitted infections, anxiety, and depression can complicate care.

• Reproductive adulthood: Family responsibilities, work demands, pregnancy, fertility concerns, and stress influence health priorities and access to care.

• Pregnancy after age 35: The chapter explains that risks may reflect accumulated chronic conditions and aging-related changes; it also notes increased concern for certain genetic anomalies.

• Later reproductive age: Changing personal priorities, chronic illness, perimenopausal changes, and increased screening needs may affect care.

• Nursing implication: Match education, assessment, prevention, and referrals to the patient’s developmental stage and individual health circumstances.

Socioeconomic circumstances and barriers to care

• Potential barriers: Limited finances, lack of resources, unemployment, competing work or family responsibilities, restricted access to services, discrimination, and fear or reluctance to seek care.

• Why barriers matter: A patient may postpone preventive or reproductive care until pregnancy, pain, abnormal bleeding, discharge, infertility, or another urgent concern occurs.

• Inclusive care: Avoid assumptions about sexual orientation, gender identity, relationships, cultural background, or willingness to disclose sensitive information; stigma and fear of poor treatment can discourage health care use.

• Nursing response: Assess what limits access, maintain a respectful and nonjudgmental environment, support informed decision making, and make appropriate referrals.

Personal trauma, abuse, and health history

• Relevant history: Assess previous injuries, illness, reproductive and pregnancy history, medications, mental-health concerns, prior sexual trauma, and current or previous abuse.

• Intimate partner violence: May involve physical, sexual, emotional, or psychological abuse; the chapter emphasizes routine screening because health care encounters may be an opportunity for disclosure.

• Possible warning signs: Unexplained injuries or bruising, chronic pain, vague complaints, anxiety or depression, missed appointments, untreated injuries, inconsistent injury explanations, or a partner who refuses to leave or answers for the patient.

• Private screening: Ask about abuse when the patient is alone; the chapter notes that disclosure may be unlikely when a potentially abusive partner is present.

• Supportive communication: Use sensitive, nonjudgmental questions; listen carefully; affirm the patient; avoid blaming or asking why the person stays; and provide resources or emergency assistance when appropriate.

• Trauma-sensitive examination: Explain what will happen, respect modesty and anxiety, maintain confidentiality, answer questions, and preserve the patient’s comfort and control during sensitive examinations.

Workplace and home environment

• Assess exposure settings: Ask about hazards in the home, workplace, school, community, and leisure environments.

• Biological hazards: Viruses, bacteria, fungi, and parasites.

• Chemical hazards: Pesticides, industrial or household chemicals, cleaning solvents, tobacco smoke, lead, asbestos, and other toxins.

• Radiation and physical hazards: Radiation, excessive heat or cold, noise, unsafe machinery, moving vehicles, weapons, unsafe building materials, and ergonomically poor workstations.

• Potential reproductive effects: Environmental hazards may affect fertility, fetal development, live birth, and a child’s later physical or mental development.

• Stress and role strain: Conflicting employment, financial, caregiving, and home responsibilities can contribute to anxiety, depression, sleep problems, and physical illness.

• Nursing response: Identify exposures and safety concerns, assess stress and coping, provide individualized education, support healthier conditions when possible, and refer for additional assistance as needed.

Practical whole-person assessment

• Interview setting: Use a private, relaxed environment; introduce yourself; protect confidentiality; and ask questions sensitively and without judgment.

• Open-ended questions: Begin with the patient’s own reason for seeking care and ask what other concerns are important to her.

• Key assessment domains: Age and developmental stage; occupation; cultural and social context; present and past health; reproductive history; family history; medications; support systems; abuse or trauma; mental health; and environmental exposures.

• Therapeutic communication: Use facilitation, reflection, clarification, empathy, and attentive listening to help the patient share information and establish trust.

• Clinical goal: Understand how the patient’s anatomy, hormones, history, relationships, resources, environment, and personal priorities fit together before developing a plan of care.