I've been going full
nerd
and reading why several women trying for babies that were still actively having sex with their dogs and were unable to conceive until they stopped for about 2-3 weeks.
There are a number of mechanisms keeping a dog's sperm from penetrating a woman's egg, such as the mitotic checkpoint which requires all chromosomes to be correctly paired, but this also often fails amongst humans (hence people with downs syndrome).
However, due to the factors listed below, dog sperm often floods a woman's womb, inundating her fertile egg, with a few penetrating through her egg's defenses and impregnating her egg, albeit for only a short time before the chromosome mismatch causes it to fail and the egg becomes infertile.
1. Dog sperm appears to be faster and stronger than a man's sperm as a dog's uterine track is harsher to sperm than a woman's. So while a man's sperm can only last 3 days in a woman's womb, a dog's sperm can last up to 9 days while it seeks to impregnate her egg.
https://breedingbusiness.com/unsuccessful-mating-of-dogs/
2. Dog sperm is shaped remarkably similar to human sperm and passes many of the same mechanical and physical checks that human sperm does
https://qph.fs.quoracdn.net/main-qimg-16322cbf89b199bfe335f9a6afdf7c8e
3. The average volume of human ejaculate is 1.5-5 ml
https://www.issm.info/sexual-health-qa/what-factors-determine-semen-volume/#:~:text=On average, men expel between,as a man gets older. whereas the average volume of dog ejaculate ranges from 30-80 ml
https://www.dvm360.com/view/canine-semen-collection-and-evaluation-proceedings
4. A healthy man can release up to 250 million sperm in an orgasm
https://www.livescience.com/32437-why-are-250-million-sperm-cells-released-during-sex.html whereas a dog releases over 2 billion.
5. The shape and pressure of the dogs cock forces much of the semen directly on to the woman’s cervix. Since dog sperm has a much lower viscosity than human sperm, meaning that it is much more liquid and less dense, dog sperm has a much easier time passing through the cervix to impregnate its mate. Much of a dog's sperm is forced into it's mate's womb over the roughly 30 minutes mating session
https://slate.com/technology/2014/0...-tie-baculum-humping-coital-tie-dog-knot.html.
6. Dogs often mate for 30-45 minutes with their mates. Due to the size of their member, the function of the knot holding all the sperm tightly inside of the vagina, the shape of the dog's penis in pushing directly against the cervix, the massive quantity of sperm ejected during a dog's 30-45 minutes of ejaculation, and the thin nature of dog's sperm, often a huge amount of dog sperm enters the womb directly - leading to a flood of sperm inside of a woman's womb overwhelming her eggs, and coating them completely while a few sperms manage to penetrate the egg's defenses and impregnate the woman's egg for a short time before the chromosome mismatch causes the egg to become infertile
https://www.verywellfamily.com/miscarriage-and-chromosomal-abnormalities-2371491.
Every time a woman cums her cervix flexes open and presses against her mate's dick head, seeking to lap up his cum. As a woman is tied to her dog for 30-45 minutes, and all the factors above, often her cervix will lap up a tremendous amount of cum over the period, resulting in even more dog sperm flooding her womb and drowning her eggs, impregnating them for a short time.
https://xhamster.com/videos/cervix-orgasm-8235846 and
https://www.pornhub.com/view_video.php?viewkey=ph58a594e4213cc.
You notice how much their cervixes opens when they're cumming, especially the second one, and even after orgasm how open they stay? It's pretty fucking hot to think about the sheer amount of doggy cum that gets pumped directly into a woman's womb whenever a woman is bred by her dog.
In effect, a dog's sperm inundates a woman's egg, coating it in sperm and ultimately often overwhelming her egg's defenses for a short time before her egg is rendered infertile by the mismatch.
Would
love to hear more about women's experiences here who have tried getting pregnant with their partner while still regularly zoo-active.