Which animal has the longest pregnancy
Interspecific pregnancy and, in turn, transferred into the uterus of cat together with cat embryos. Concomitant use of SCNT and interspecific pregnancy has also been speculated to potentially recreate the mammoth species, for example by taking genetic material from mammoth specimens preserved in permafrost and transferring it into egg cells and subsequently the uterus of an elephant. Interspecific pregnancy Interspecific pregnancy (literally pregnancy between species, also called interspecies pregnancy or xenopregnancy) is the pregnancy involving an embryo or fetus belonging to another species than the carrier. Strictly, it excludes the situation where the fetus is a hybrid of the carrier and another
Male pregnancy preferred phenotype. Syngnathidae is the only family in the animal kingdom to which the term "male pregnancy" has been applied. Human males do not naturally possess wombs to gestate offspring. The theoretical issue of male ectopic pregnancy (pregnancy outside the uterine cavity) by surgical implantation has been addressed by experts in the field of fertility medicine, who stress that the concept of ectopic implantation, while theoretically plausible, has never been attempted and would be difficult to justify – even for a woman lacking a uterus – owing to the extreme health risks to both the parent and child. Robert Winston,