Popeâs Homily at Vespers on Eve of New Year âHoly Mother Church teaches us to end the year and also our days with an examination of conscience â¦ to be grateful and to ask for forgivenessâ December 31, 2014 ZENIT Staff Francis
Progesterone causes the endometrial glands to secrete, preparing the endometrium for blastocyst implantation. If the oocyte is fertilized, the corpus luteum enlarges to form a corpus luteum of pregnancy and increases hormone production. With pregnancy, chorionic gonadotropin, secreted by the trophoblast of the chorion, prevents degeneration of the corpus luteum.
If fertilization does not occur after mating, a corpus luteum can still be formed and cause a pseudopregnancy for a period of 10-13 days. During this time no estrus will occur. If fertilization has occurred, it can be expected that fetuses will be palpable abdominally by day 14 and nipple enlargement should occur.