an interval of the menstrual cycle when fertilization is considered to be least likely, usually a number of days prior and subsequent to the onset of menstruation.
[ 1915-20 ]
an interval of the menstrual cycle when fertilization is considered to be least likely, usually a number of days prior and subsequent to the onset of menstruation.
[ 1915-20 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012