Gestation & Due Date Calculator
Enter a plug or mating date and instantly get the expected birth window, weaning date, and the date to separate pups by sex.
Mouse gestation: 19–21 days (typically 20). Weaning ≈ 21 days.
Never miss a due date
Track plug dates automatically
Moustra logs every plug event and surfaces the due date, weaning date, and separation date as tasks and notifications for your whole lab.
Try Moustra FreeBreeding timeline
Pick a species and enter a plug/mating date to see the timeline.
How to use the gestation calculator
- Select your species — mouse, rat, hamster, gerbil, guinea pig, or rabbit. Each carries its own typical gestation and weaning age.
- Enter the plug or mating date — the morning you observed a copulation plug is embryonic day 0.5.
- Read the timeline — the expected birth window, weaning date, and the date to separate pups by sex update instantly.
Typical gestation and weaning by species
| Species | Gestation (days) | Weaning (days) |
|---|---|---|
| Mouse | 19–21 (≈20) | 21 |
| Rat | 21–23 (≈22) | 21 |
| Hamster (Syrian) | 15–18 (≈16) | 21 |
| Gerbil | 24–26 (≈25) | 24 |
| Guinea pig | 59–72 (≈65) | 21 |
| Rabbit | 28–33 (≈31) | 35 |
Frequently Asked Questions
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