Sea Otter Pregnancy Date and Progress Calculator
Sea Otter Pregnancy Calculator
This calculator estimates a sea otter pregnancy timeline using a mating date and a simple model for delayed implantation. Sea otters can show a wide range of reported total pregnancy duration because the embryo may not implant immediately after mating.
What this calculator provides
- Estimated implantation date based on your delayed implantation input.
- Estimated due date based on your total pregnancy length.
- Progress tracking as of a selected date, shown as both a percentage and elapsed days.
- Sortable/exportable table with a clear timeline and customizable columns.
How the math works
The calculator converts months into days using an average month length of 30.4375 days, then adds days to the mating date.
Key formulas
Inline forms:
\( D_{\text{implant}} = D_{\text{mating}} + 30.4375 \cdot M_{\text{delay}} \)
\( D_{\text{due}} = D_{\text{mating}} + 30.4375 \cdot M_{\text{total}} \)
\( M_{\text{active}} = M_{\text{total}} - M_{\text{delay}} \)
\( P(\%) = 100 \cdot \frac{\Delta days}{days_{\text{total}}} \)
Block form:
\[ days_{\text{total}}=\mathrm{round}(30.4375\cdot M_{\text{total}}),\quad days_{\text{delay}}=\mathrm{round}(30.4375\cdot M_{\text{delay}}),\quad days_{\text{active}}=days_{\text{total}}-days_{\text{delay}} \]
How to choose realistic inputs
If you want a typical scenario, many references describe sea otter pregnancy as roughly about 6 months total, often explained as ~2 months delayed implantation plus ~4 months active pregnancy. If you want to explore uncertainty, increase or decrease Total Pregnancy Length while keeping Delayed Implantation smaller than total months.
Important notes
This is an educational estimation tool. Real pregnancy timing can vary by individual, conditions, and observation uncertainty. If you are working with wildlife rehabilitation or veterinary care, use this calculator as a planning aid and confirm details with qualified professionals and observed clinical signs.