What are the future directions for research on higher-order multiple pregnancies and births?

Mar 15, 2023 ... Fraternal twins happen because some people release two eggs (or more) at a time. That's called superovulation. Advertisement. If two sperm ... ... proportion of provided data. Analysis. We defined the outcome in our analyses ... We based our analyses on data from a population-based twin sample of ... Apr 1, 2004 ... If, instead, people tend to choose mates like themselves, then fraternal twins could share more than 50 percent of their genes--and hence more ... Jan 1, 2006 ... The proportion of population risk in major depression attributable to genetic factors appears to be moderately greater in women than in men. U.S. Census Bureau, Resident Population in Twin Falls County, ID ... Percent of Population Below the Poverty Level (5-year estimate) in Twin ... Nov 13, 2022 ... To study the risk of spontaneous preterm birth in twin pregnancies compared with singleton pregnancies. Design. Population-based registry study. Apr 20, 2023 ... Just over 3 percent of babies in the United States are now born in sets of two, three or more, with the majority — about 97 percent — of these ... Apr 23, 2025 ... As of 2023, the birth rate for twins in the U.S. was 30.7 per 1,000 live births. ... This percentage would increase if multiple birth rate per ... Conjoined twins occur once in every 50,000 to 60,000 births. Approximately 70 percent of conjoined twins are female, and most are stillborn. Approximately 75 ... Mar 12, 2021 ... The twinning rate of 12.0 for the world as a whole means that one of every 42 children born on earth is a twin. Table 1 also shows that Asia and ...