What sequence of events occurs in the female reproduction tract during menstruation? 1. Hormones signal the lining of the Uterus to break down; it sloughs off and passes out of the body; later the uterine lining begins to thicken and start the process over again.
B. Hormones signal the lining of the uterus to thicken; this thickened lining process bleeding know as menstrual flow.
C. An egg is released from the ovary causing a bloody discharge; if sperm are present the egg may be fertilized in the uterus and implant in the Fallopian tube.
D. An egg is released from the ovary; it travels down the Fallopian tube to the uterus, where it implants; if sperm are present, a pregnancy begins.