The rate of pseudocyesis in the United States has declined significantly since 1940. The rate in 1940 of one occurrence for approximately every 250<unk> es had dropped by 2007 to between one and six occurrences for every 22,000 births. In Nigeria, the frequency of<unk> es was 1 in 344 true<unk> es, and in Sudan<unk> es were reported to be 1 in 160. There were about 550 cases documented in the literature as of 2016, with most cases in those between the ages of 20 and 44. Women of reproductive age comprise the majority of pseudocyesis occurrences. About 80% of women who experience pseudocyesis are married.<unk> es are more common in societies with certain cultures and religions, particularly in areas where there is a high degree of pressure for women to have multiple children, and for those children to be male. Although rare, pseudocyesis occurs more commonly in developing countries. It is reported more frequently in countries that place heavy emphasis on fertility and childbearing; such pronatalist beliefs are often highly prominent in developing countries. In , a woman is allowed to share her husband's property only if she bears children. In these countries (and other developing nations), infertile women often experience abuse, blame, and discrimination. Societal factors enforce the importance of female fertility in these countries, thus possibly contributing to pseudocyesis rates. In addition to men, mothers of pregnant women may experience Couvade syndrome, and a woman can experience multiple episodes of pseudocyesis in her lifetime.
False pregnancy
Cryptic pregnancy
Invasive hydatidiform mole
Forced pregnancy
Molar pregnancy
Postpartum physiological changes
Unintended pregnancy
Abdominal pregnancy