Milk - Milk production - Bovine oestrous cycle and mild production

12 important questions on Milk - Milk production - Bovine oestrous cycle and mild production

How long is the oestrous cycle of a cow and when does it start?

21 days, starts at puberty at approximately 8 months

Which two does the luteal phase comprise?

A metestrus and a dioustrus

Which two does a follicular phase comprise?

A proestrus and an oestrus.
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Describe the luteal phase.

the luteal phase starts with ovulation and lasts until the regression of the corpus luteum.

Describe the follicular phase.

The erid between the regression of a copus luteum an ovulation.

Why is progesterone being produced?

Progesterone is produced by the corpus luteum and functions to maintain an appropirate uterine endometrium for a potential embryo to develop in.

When is the concentration of progesterone the highest?

The concentration increases during the luteal phase. When there is no fertilization the corpus luteum will degenerate an stop producing progesterone.

When is the concentration of oestrogen the highest?

During the pollicular phase.

What is the ideal insemination time?

Within the range of 24-36 hours after oestrus detection.

When is the dry period of a cow?

A cow is dried off at approximately 42-60 days before calving.

How long does a cow need to recover after calving?

It requires 45-50 days to involute and and the resumption of ovarian cyclicity takes 18-25 days.

What is the calving interval?

Reflects the period between one calving and the next and has an average of 413 days in the Netherlands

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