menstrual cycle and reproductive hormones
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34 Terms
FSH
Which anterior pituitary hormone starts increasing about 4 days before menstruation?
12th–13th day, before ovulation
When does FSH peak during the menstrual cycle?
LH
Which anterior pituitary hormone peaks 24–36 hours before ovulation?
beginning and end of the cycle
When are LH levels low during the menstrual cycle?
day 1
When is estrogen at its lowest level?
5th–7th day
When does estrogen begin to increase?
drops
What happens to estrogen around mid-cycle?
after ovulation
When does progesterone begin to increase?
7–10 after ovulation
When does progesterone peak during the cycle?
Progesterone
Which hormone is produced by the corpus luteum during the first 10–12 weeks of pregnancy
placenta
Which organ produces progesterone for the remainder of pregnancy?
Acts on ovarian follicles
What is the main function of FSH in females?
sperm production and growth (sertoli cells)
What is the main function of FSH in males?
triggers ovulation
What is the main function of LH in females?
Stimulates testosterone secretion (leidig cells)
What is the main function of LH in males?
estrogen
What hormone from ovarian follicles is responsible for secondary female characteristics?
Prepares the uterus for implantation of a fertilized egg
What is the function of progesterone in females?
progesterone
Which hormone is associated with testosterone secretion and sperm maturation in males?
leydig cells
Which cells in the testes are associated with testosterone secretion?
sertoli cells
Which cells in the testes are associated with sperm production and growth?
21-35
regular monthly cycle
day 14
what day is ovulation
3-7 days
how many days does bleeding occur
12-24hrs
How long is the ovum viable after ovulation?
5 days
How long can sperm remain viable in the fallopian tube?
12–24 hours after ovulation
When can fertilization of the ovum occur?
5-6 days
How long does it take for a zygote to develop into a blastocyst?
3-4 days
How long does the blastocyst travel to the uterine implantation site?
2-3 days
How long does the blastocyst float before implantation?
day 6-12
On what day does implantation of the fertilized egg in the uterus generally occur?
corpus luteum
What is formed after ovulation?
corpus luteum
endocrine function; produces progesterone in anticipation of pregnancy
placenta
endocrine function after fertilization
corpus albicans
if no fertilization occurs: luteolysis; becomes fibrotic remnant of the corpus luteum