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A man performing artificial insemination of a cow. A breeding mount with built-in artificial vagina used in semen collection from horses for use in artificial insemination. Artificial insemination is used for pets, livestock, endangered species, and animals in zoos or marine parks difficult to transport.
Superfetation. Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. [ 1][ 2][ 3] In mammals, it manifests as the formation of an embryo from a subsequent menstrual cycle, while another embryo or fetus is already present in the uterus.
Male pregnancy. Male pregnancy is the incubation of one or more embryos or fetuses by organisms of the male sex in some species. Most species that reproduce by sexual reproduction are heterogamous — females producing larger gametes (ova) and males producing smaller gametes (sperm). In nearly all animal species, offspring are carried by the ...
Interspecific pregnancy (literally pregnancy between species, also called interspecies pregnancy or xenopregnancy) [ 1] is the pregnancy involving an embryo or fetus belonging to another species than the carrier. [ 1] Strictly, it excludes the situation where the fetus is a hybrid of the carrier and another species, thereby excluding the ...
Female cycle. The average length of the reproductive cycle for females is 2–4 weeks. Females reach sexual maturity (puberty) between 8 and 18 months of age. There is a tremendous variability in the maturation age between breeds, and even within a breed of dog. [ 5] 1.
Some women using oral birth control reported getting pregnant while on weight loss medications, and that isn't a coincidence—but, Dr. Sekhon notes, it also only applies to two specific weight ...
Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers. [ 1][ 2] The term superfecundation is derived from fecund, meaning able to produce offspring. Homopaternal superfecundation is fertilization of two ...
The other reason that some women on Ozempic are getting pregnant unexpectedly is that the drugs may interfere with the absorption of contraceptive pills.As Dr. Robles explains, “the mechanism is ...