Reproductive Cycles

Question 1

What do small follicles produce?

Answer 1

Androgens and inhibin B

Question 2

What do large follicles produce?

Answer 2

Androgens, Oestradiol, Inhibin A

Question 3

What does the corpus luteum produce?

Answer 3

Progesterone, Oestradial, Inhibin A

Question 4

Describe the roles of oestradiol in the reproductive cycle

Answer 4

Sexual receptivity
Induces pre-ovulatory LH surge
Uterine receptivity and gamete transport

Question 5

Describe the roles of progesterone in the reproductive cycle

Answer 5

Can be thought of as an “ANTI oestrodial”

Primes sexual receptivity (e.g. seasonal breeding)
Blocks induction of LH surge
Uterine receptivity and gamete transport
Maintains pregnancy

Question 6

Describe the types of ovulation across animals

Answer 6

Induced ovulators: When a female ovulates due to an externally derivedd stimulus during mating e.g. penis spikes in cat

Spontaneous ovulators: Induce LH surge in response to oestrodial

Question 7

Describe the cycles in rodents

Answer 7

Short cycle with spontaneous ovulation

Split into 4 stages;

1. Oestrus
2. Metoestrus (Dietrus 1)
3. Diestrus 2
4. Pro-oestrus

Oestrus is when ovulation happens and the corpus luteum is produced

Metoestrus (Di-1) is when progesterone in produced

Di-2 is when small follicles are produced

Pro-oestrus is when follicular growth happens and oestrogen production leading to an LH surge