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.
Brown Discharge before period caused by implantation (implantation bleeding) Implantation bleeding and/or implantation brown spotting is an early symptom of pregnancy. It is an indication that the fetus has implanted itself in the uterine endometrial lining. While the fetus burrows itself inside the uterine lining, it leads to rupture of the lining.