The most common form of
human multiple birth is twins (two babies), but cases of triplets (three), quadruplets (four), quintuplets (five), sextuplets (six), septuplets (seven), and octuplets (eight) have all been recorded with all siblings being born alive.
Human multiple births can occur either naturally (the woman ovulates multiple eggs or the fertilized egg splits into two) or as the result of infertility treatments such as IVF (several embryos are often transferred to compensate for lower quality) or fertility drugs (which can cause multiple eggs to mature in one ovulatory cycle).
Not exact matches
The process, reported in
Human Reproduction, utilizes DNA fingerprinting (an assessment of active genes in a given cell) to boost the success rate of IVF and lower the chances of risky
multiple births by identifying which of several five - day - old embryos are most likely to result in pregnancy The new method, which will replace unproved alternatives such as choosing embryos based on their shape, is likely to up the success of women becoming pregnant and lower their chances of having
multiple births.
Moreover, because every
human being consumes and disposes of
multiple natural resources, a
birth that does not occur averts consumption impacts in every direction.
They have given
birth to companies that have licensed the technology for
multiple — and in many cases overlapping — applications in
human therapeutics, agriculture, and industry.
When it comes to
humans,
multiple births aren't common.
(
Human multiple -
birth pregnancies are different because normal implantation in us is in the uterine body, not the uterine horns - but even there, various environmental factors influence
multiple birth baby size.