False pregnancy False pregnancy False pregnancy, also known as phantom, hysterical pregnancy, pregnancy scares or pseudocyesis, is the appearance of clinical or subclinical signs and symptoms associated with pregnancy when the person is not actually pregnant. False pregnancy may sometimes be purely psychological. It is generally believed that false pregnancy is caused by changes in the endocrine system of the body, leading to the secretion of hormones that cause physical changes similar to those during pregnancy. Some men experience the same illnesses as a woman would experience while pregnant when their partner is pregnant (see Couvade syndrome), possibly caused by pheromones that
Male pregnancy birth. Some transgender men can become pregnant. This is possible for transgender men who have undergone female puberty (not taken blockers) and retain functioning ovaries and a uterus even after having otherwise physically transitioned to male with HRT. While previous testosterone usage does not preclude pregnancy, it must temporarily cease prior to conception and for the duration of the pregnancy to ensure a healthy outcome. Fetus in fetu, though not an actual pregnancy, is an extremely rare condition in which a mass of tissue resembling a fetus forms inside the body. This is a developmental abnormality in which a fertilized