Gynaecology or gynecology is the medical practice dealing with the health of the female reproductive systems (vagina, uterus, and ovaries) and the breasts. Literally, outside medicine, the term means "the science of women". Its counterpart is andrology, which deals with medical issues specific to the male reproductive system.
Post-coital bleeding (bleeding after sex) could be a sign of infection, trauma, an ectropion or tumours and should be investigated. You should consult with your doctor so as to establish the cause.
Endometriosis is defined as endometrial tissue at abnormal sites. It is a common gynaecological condition which effects mainly women of child-bearing age and can cause debilitating pain and fertility problems. It undergoes cyclical changes like the normal endometrium (i.e. the lining of the uterus) but does not shed, therefore causing problems at the site. Scarring can occur, causing blockage of the tubes leading to infertility.
This is another common condition effecting women of reproductive age. It is characterised by suppression of ovulation, high androgen levels, and hirsutism (abnormal hair growth). Apart from increasing susceptibility to diabetes, the patient also has fertility problems and increased risk of endometrial cancer