Answer: Ares (the god of war), Hebe (the goddess of youth), Eris (the goddess of discord), Eileithyia (goddess of childbirth) and Enyo, a war goddess responsible for the destruction of cities and attendant upon Ares; however, Homer equates her with Eris.
Answer: Humans boys can not give birth, it is physical impossible. Boys can only give birth it they are a transvestite. Where doctors take away there penis and turn it into a vagina. They also take out all the man organs of a penis. They put all the female organs in the body witch allows them to give birth. Just like a women.
Answer: I assume that you are referring to men who have used surgery, hormones, and cosmetics to look more feminine. In that case the answer is no - they have no uterus, no ovaries and no menstrual cycle.
Answer: Usually people say it is possible to conceive at soonest 2-3 weeks after giving birth if you are not breast feeding. If you are breastfeeding exclusively this will prevent you from becoming pregnant until you stop.
So, in short, it is not possible to have a pregnancy resulting from sex that occurred even immediately prior to the birth of the baby. If you are having symptoms consistent with pregnancy or have any concerns I would recommend you consult your general practitioner or health visitor.