Lecture 4: Preparation for Pregnancy/Ovulation Flashcards Preview

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Flashcards in Lecture 4: Preparation for Pregnancy/Ovulation Deck (17):

Describe the composition of cervical mucous during ovulation

Thinnest around this time


List the three stages of the ovarian cycle

Follicular phase, Ovulation, Luteal phase


List the three stages of the endometrial cycle and when each occurs

Menstrual phase (Day 1-4), Proliferation phase (Day 4-14), Secretory phase (Day 15-28)


When does the follicular phase occur and what are the major events?

Days 1-14 of menstrual cycle; development of mature Graafian follicle and secondary oocyte


Which of the following is primarily responsible for ovulation?

A. Rise in levels of FSH
B. Secretion of progesterone
C. Synthesis of testosterone
D. Sharp rise in levels of LH

D. Sharp rise in levels of LH


When does ovulation occur? What are the major events?

Day 14 of menstrual cycle; egg is released from Graafian follicle, thecal cells secrete progesterone


What is the significance of the luteal phase?

Corpus Luteum formed from theca and granulosa cells


What is the fate of the corpus luteum if fertilization does not occur?

Inhibin causes its regression; it's replaced with scar tissue resulting in the formation of the corpus albicans


What occurs during the menstrual phase?

Endometrial build up sloughs off, resulting in menstrual flow


What is the significance of the spiral arteries during the menstrual phase?

Menstruation begins with vasoconstriction of spiral arteries supplying endometrium


What causes the vasoconstriction of spiral arteries?



What occurs during the proliferation phase?

Endometrial growth increases thickness, estradiol increased


What occurs during the secretory phase?

Estrogen levels decrease, endometrial growth stops. Mucous glands develop and begin secretion; rise in progesterone


What is the ovulated product?

Ovum at Metaphase II, 1st polar body, ZP, corona radiata, expanded cumulus oophorus


Fertilization age

Dates age of embryo from time of fertilization


Menstrual age

Dates embryo from start of mother's last menstrual period; two weeks greater than fertilization age


What is the result of proliferation of residual theca and granulosa cells following the luteal phase?

A. Placenta
B. Corpus luteum
C. Corpus abicans
D. Follicle

B. Corpus luteum