Gestation and Parturition

Question 1

What are the Ec, E, ToO, and G for cows?

Answer 1

21 d, 12-18 hr, 11 hr post-estrus, 282 d.

Question 2

What is the Ec, E, ToO, and G for ewes?

Answer 2

17 d, 24-36 hr, near the end of E, 148 d.

Question 3

What is the Ec, E, ToO, and G for mares?

Answer 3

21 d, 5-7 d, 3-6 days after estrus, 335 d.

Question 4

What is the Ec, E, ToO, and G for sows?

Answer 4

21 d, 48-72 hr, 35-45 hr after estrus starts, 115 d.

Question 5

What is the Ec, E, ToO, and G for bitches? 
Only need to know Ec, E, and G.  
Ec= Estrus Cycle. 
E= Estrus. 
G= Gestation.

Answer 5

6 mo, 9 d, 4-24 days after the start of estrus, 63 d.

Question 6

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What is the Ec, E, ToO, and G for Queens?
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Answer 6

18 d, 9-10 d, induced (male penis barbs), and 52 d.

The estrus is about half of the estrus cycle.

Question 7

What is the Ec, E, ToO, G, and O for Does (rabbits)?

Answer 7

19 d, constant, induced, 31 d, 4-8.

Question 8

What is the Ec, E, ToO, G, and O for Human Females?

Answer 8

Menstrual, none, midcycle, 270 d, 1 (normally).

Question 9

What is the Ec, E, ToO, G, O for Hens?

Answer 9

None, None, 6 a.m.-2 p.m., none, 5-10 (clutch).

Question 10

What is the dif. between estrus cycle and menstrual cycle? Similar?

Answer 10

Dif.: Ec: Day amount varies, Mc: 28 days, Mc: Uterine tissue is lost in large amounts, Ec: no tissue is lost.
Sim.: both are cycles, both have rising and falling hormones, both involve progesterone and estrogen.