Is the rate of twinning increasing in other mammals?

Nobody knows what causes identical (monozygotic) twins. Everyone has the same chance of having identical twins: about 1 in 250. Identical twins do not run in ... Aug 8, 2023 ... Conjoined twins refers to twins that are physically fused in utero and consequently at birth. ... percent.[2] There is no increased risk in future ... Aug 10, 2022 ... The prevalence of natural human chimeras in the general population ... Twin chimerism, also known as blood chimerism or transfusion chimerism, is ... 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 ... ... what percentage of their cause is due to genes. To do this we find people with the disease who have a twin, and then find out whether the twin is also ill. A larger proportion of the twins. Discussion. This is the first population-based twin-study estimating the heritability of BPD by using an updated statistical ... Apr 18, 2025 ... For a group that makes up just 0.4 percent of the world's population, identical twins have enthralled the general populace. Depictions of ... Jun 28, 2021 ... There was marked a difference between the proportion of Aboriginal and non-Aboriginal twins ... twin pregnancies: a population-based register ... Dec 25, 1986 ... This was a significantly higher proportion (chi-square = 6.11; P<0.025) than that of dizygotic twin pairs (14 of 43; 32.6 percent) recog- nized ... Nov 24, 2024 ... The rate of stillbirth is high and is estimated to be around 60 per cent. ... Population Fund (UNFPA) in support of reproductive, adolescent and ...