A biochemical test for the direct assessment of endometrial function: measurement of the major secretory endometrial protein PP14 in serum during menstruation in relation to ovulation and luteal function. - Fay,T.N.; Jacobs,I.J.; Teisner,B.; Westergaard,J.G.; Grudzinskas,J.G. (Hum Reprod, 1990)