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.
Old Blood. If you notice brown spotting a week or two after your monthly period, it would often mean that some amount of tissue and menstrual blood were not properly expelled out of your body. Since they could still be inside the uterus, they need to be discharged in a form of spotting even after your period has ended.