I have had most part of my females(80%) with a p.o.s.(like in books) but I never had a female that did not shed from ovulation to birth. Some females will work the same every year, some with and some without p.o.s. Can a shed 6 weeks after ovulation be called p.o.s. ? One thing must be considered, how long did she shed before ovulation ? If she did it 3 weeks before ovulation, most part of the time, you will not get a p.o.s. in the 3 weeks but in the 7 or 8 weeks.
The P.O.S., is just a way to estimate the birth date when you missed the ovulation .

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