Mucus Plug

What does the mucus plug protect during pregnancy?

The mucus plug completely seals the cervix from day 25 to 30 of pregnancy. Bacteria from the vagina cannot ascend to the puppies as a result. It remains intact until approximately 24 to 72 hours before birth.

The viscous consistency is caused by hormones in early pregnancy. Progesterone ensures that the mucus thickens and hardens – like a natural cork.

How do I recognise the passage of the mucus plug?

A clear to slightly pink-coloured clump of mucus indicates that the cervix is opening. Some bitches lick it away immediately – you then only notice a wet spot in the basket.

The mucus plug can also pass in parts over several hours. A stringy, glassy discharge without a strong odour is normal. In smaller bitches, the passage is usually less noticeable than in large breeds.

When does mucus discharge become concerning?

Dark red or brown discharge before day 58 of pregnancy indicates complications. Likewise, a fishy or foul odour – this can indicate a uterine infection.

If the mucus plug passes before day 55, the risk of infection can increase significantly: The puppies are not yet ready for birth, but the protection is missing. A vet visit within two to three hours is then advisable.

Heavy bleeding – more than a tablespoon full – is never normal at any point during pregnancy.

What happens after the mucus plug passes?

Birth usually begins 12 to 48 hours after complete passage. In first-time bitches, it often takes longer – up to 72 hours is still within the normal range.

Some bitches become restless, scratch blankets together or seek increased closeness. Body temperature drops by around 1 °C approximately 12 to 24 hours before the first contraction.

After the mucus plug is expelled, susceptibility to infections increases. Swimming or bathing should be avoided, and excessive sniffing of other dogs can also be problematic.