reproductive endocrinology II

Question 1

Describe the implantation process of fertilized cells into the uterus.

Answer 1

after fertilisation the zygote travels down fallopian tube and reaches the uterus, where it implants into the endometrial lining about 6-10 days post-fertilization

Question 2

what type of cells form the placenta

Answer 2

trophoblast cells from blastocyst

Question 3

what is produced by placenta after implantation to maintain corpus luteum

Answer 3

human chorionic gonadotropin (hGC)

Question 4

what hormone is produced by corpus luteum and placenta

Answer 4

progesterone

Question 5

what hormone is produced by placenta

Answer 5

estrogen

Question 6

what hormone is produced by placenta and ovaries

Answer 6

relaxin

Question 7

how does progesterone maintain pregnancy

Answer 7

maintains endometrium
suppresses contractions

Question 8

how does estrogen maintain pregnancy

Answer 8

increases blood supply to uterus and placenta

Question 9

What role does progesterone play in maintaining pregnancy?

Answer 9

prevents contractions and maintains uterine lining

Question 10

What are the major events in the first phase of parturition?

Answer 10

softening and dilation of cervix

Question 11

What happens during the second stage of parturition

Answer 11

baby is delivered

Question 12

What is the third stage of parturition?

Answer 12

placenta is delivered

Question 13

What hormonal events lead to the initiation of lactation?

Answer 13

drop in progesterone and estrogen allow for prolactin to stimulate milk production

Question 14

How does the suckling reflex influence milk production?

Answer 14

signals hypothalamus to release prolactin