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.
Experiencing dark brown discharge instead of period is very common in perimenopausal and/or menopausal women. During this period women experience hormonal changes, irregular periods and some other menopause symptoms like hot flashes, mood swings, body ache, depression, foul urine odor, etc.ain causes of the dark brown discharge during and/or after intercourse include hymen tears, pregnancy, cervical dysplasia, inflammations and/or irritations, adenomyosis, sexually transmitted diseases (STDs), vaginal yeast infection and cervical polyps.