Reproductive Cycle of Domestic Animals

 

 

Species

Age of

Nature of heat

Duration of

Time of

Period of

Gastation

Sperm survival

 

Puberty

cycle recurrence

oestrous

ovulation

maximum

period

in uterus

 

 

 

 

 

fertility

 

 

1. COW

2-21/2 yrs

Polyestrous

8-24 hrs

14 hrs after

Last 8 hrs of

282 days

20 hours

 

 

Recurrence

Average

the end of

oestrous.

 

 

 

 

(21 days)

19 hrs

oestrous.

 

 

 

2.MARE

2 yrs

Seasonally

3-40 days

24 hrs

Penultimate

336 days

2-3 days

 

 

polyoestrous

Average

before the

day of oestrous.

 

 

 

 

(21 days)

7 days

end of

 

 

 

 

 

 

 

oestrous.

 

 

 

3.EWE

6-12 months

Seasonal

36 hrs

Later part of

2nd half of

150 days

22-42 hours

 

 

 

 

oestrous.

oestrous.

 

 

4. SOW

5 months

Polyestrous

2-3 days

36 hrs after

12-36 hrs

120 days

24 hours

 

 

 

 

onset of

after the onset

 

 

 

 

 

 

oestrous &

of oestrous.

 

 

 

 

 

 

continues upto

 

 

 

 

 

 

 

next 12 hrs

 

 

 

5. BITCH

9-12 months

Monoestrous

8 days

1-3 days

Next 3 days

62 days

4 days

 

 

 

(Proper

after onset

after the

 

 

 

 

 

oestrous)

of oestrous

onset of

 

 

 

 

 

 

proper.

oestrous.

 

 

6.BUFFALO     2.6 yrs

Polyestrous

8 hrs-3 days

10-20 hrs

Last 8 hours

307 days

Less than

 

Bull 2 yrs

Recurrence

Average.

upto the end

of oestrous

 

24 hours

 

 

(21 days)

32 hrs

of estrous

 

 

 

7. GOAT

4-8 months

Polyestrous

1-2 days

 

-

150 days

 

 

 

Recurance

 

 

 

 

 

 

 

(18-27 days)

 

 

 

 

 

8.CAMEL

3-4 yrs

Polyestrous

1-7 days

 

 

406 days

 

 

 

Recurrence

 

 

 

 

 

 

 

(10-20 days)

 

 

 

 

 

 

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