Pregnancy and Human Development Flashcards

Flashcards about Pregnancy and Human Development.

Trophoblast

Critical for implantation and placental development.

Embryoblast

Becomes the proper embryonic disc.

Human Chorionic Gonadotropin (hCG)

Rescues corpus luteum, facilitating sex hormone production critical for pregnancy; promotes uterine adaptations, prevents uterine contractions, etc; contributes to placenta

Ectoderm

Outer germ layer formed during gastrulation.

Mesoderm

Middle germ layer formed during gastrulation.

Endoderm

Inner germ layer formed during gastrulation.

hCG

Produced by placenta, supports corpus luteum.

Estrogen

Produced by corpus luteum and placenta to support uterine growth, fetal organ development.

Progesterone

Produced by corpus luteum and placenta, calms the uterus, contributes to placental and uterine development.

Relaxin

Produced by corpus luteum and placenta; calms the uterus and relaxes pelvic ligaments.

Prolactin

Produced by pituitary to promote milk production.

Oxytocin

Produced by pituitary and stimulates labor.

Mammary Gland

Contains lobes with smaller subunits called lobules, alveoli reside in the lobules and produce milk, milk passes through the lactiferous ducts, develop during puberty, become fully functional during last trimester of pregnancy under hormonal control

Prolactin-Releasing Factors (PRFs)

Released by the hypothalamus to portal circulation during breastfeeding.

Early Dilation

First stage of labor where the baby's head is engaged and the cervix begins to dilate.

Expulsion

Second stage of labor involving the delivery of the baby.

Placental Stage

Third stage of labor where the placenta detaches and is removed.