Estimating the age of a foetus
When a foetus is aborted or born mummified, it is sometimes useful to estimate the age at which the foetus died.
This simple spreadsheet provides a rough guide based on the formulae:
((Crown/rump length mm)/3)+21
Insert the length of your foetus in the yellow box
A more accurate formula is ((crown/rump length)/3.11)+21.07
The opposite calculation can be carried out. The pregnant sow is exposed to some mycotoxins - how big would the foetus be?
Causes of stillborn and mummified piglets