Well of course it is always virtually open. But it starts opening before birth just like humans.
No. Dogs don't have periods either. Does ("girl" bunnies) go into heat much differently than dogs do; they don't bleed out the vagina before they are really receptive to mating.
vagina
The penis is inserted into the opening at the front of the vagina.
If the vaginal opening is not cleansed also if the vagina has a infection
The vagina is like before pregnancy but the cervix, the opening to the uterus, is closed by a mucus plug.
Bulging of the top of the vagina into the lower vagina or outside the opening of the vagina.
No, you should probably talk to your doctor about the swelling... Just saying.
Vagina
The vaginal orifice is the opening of the vagina
The vaginal orifice is the opening of the vagina
The Hymen is Located Rite below the entrance of the vagina.
Cervical cancer is a cancer that starts in the cervix at the opening at the of the vagina. It is the 3rd most common type of cancer but affects less women in the US than other countries because of the regular use of pap smears.