oestrus

noun 0.727

estrous cycle

noun 0.667

luteal phase

noun 0.560

menstruum

noun 0.548

midgestation

noun 0.546

metasternum

noun 0.536

midstage

noun 0.531

menstruation

noun 0.529

estradiol

noun 0.527

endometrium

noun 0.521

estrone

noun 0.521

postmenopause

noun 0.519

metaphase

noun 0.512

metatherian

noun 0.511

mesovarium

noun 0.505

ester

noun 0.502

gestation period

noun 0.502