No. If they did, the species wouldn't last long.
Until they die or expire
9 months
A pregnancy usually lasts for 9 months
9 months 40 weeks
40 weeks from the last period.
it lasts for 4months
3 days.
Pregnancy in ferrets lasts 38-42 days or 6 weeks
Pregnancy last from 38-40 weeks.
12 months duhhh
28 to 32 days