1 Incubation time varies with species, clutch size, and temperature and humidity in the nest. 2  The incubation time for most species is 45 to 70 days.  Research indicates that the sex of an embryo is determined sometime after fertilization, as the embryo develops, and may be temperature dependent.
brown discharge usually does not indicate a period. It could very possibly be implantation bleeding, however, as your using a condom every time it is unlikely. But still possible. If your actual period doesn't come I suggest a HPT. I'm not saying your pregnant, but it is possible.
Some women take brown discharges for brown periods. When you experience your period late and have brown spotting, this may not be the beginning of menstruation, but rather a sign that you are pregnant. Such discharges are quite common during a womanâs first pregnancy, but are not experienced by all women.