Birth via the vagina (as opposed to caesarean section).

plural of vaginal birth

plural of accident of birth

Any of the repetitive spasms of pain associated with labour

plural of birth pang / (by extension) The difficulty associated with a new project.

Alternative form of birthing chair

plural of lotus birth

(uncountable) The practice of not severing a newborn's umbilical cord, but rather allowing it to dry out and separate naturally after a few days. / (countable) A birth performed with this practice.

plural of water birth

(biology) A birth (or vegetal reproduction) after spontaneous, unfertilized gamete-development in a virginal mother, parthenogenesis