Mark Dunn , a penny researched, a pound experienced. An Overview Insemination does not usually result in a pregnancy carried through to a healthy birth, for a variety of reasons which are too complex and numerous to dedicate much of this post to and many of which are poorly understood or lacking in understanding.
While the range of possibilities is fairly wide in the situation you ask about, the most likely outcome, statistically speaking, is that pregnancy does not occur. There is generally the possibility that one or both men end up fertilizing one or more eggs with their sperm, assuming the woman you ask about possesses viable and accessible eggs and the sperm are capable of functioning towards a completed fertilization.
Some basic factors to consider are that there are different levels of human fertility and reproductive compatibility, women are more likely to become pregnant during certain stages in their cycle and under certain circumstances, and that there can be only one egg readily available to sperm or, less often, more than one egg.
We can stack the deck in favor of pregnancy, but a lot still remains difficult to micromanage or lacking in scientific understanding. Interesting Possibilities Contrary to what all the other posts are currently claiming, it does not actually require more than one egg for multiple sperm to contribute to multiple offspring. The range of options is not that limited. However, in line with what some of the better-informed posters are saying, multiple children can be born from one partner or more than one partner.
That said, if something less common happens, there is no reason to assume that a multiple pregnancy in this hypothetical situation is involving more than one father. So, one man can be the father of all the offspring, or there can be some children that are fathered by one man while one or more of the others are fathered by a different man. This may be more likely in situations where multiple eggs are available for fertilization, but there is also the potential for this to happen even when only one egg is involved.
Thus far, split paternity has been documented with multiple eggs, and single paternity has been documented with a single egg that multiple sperm fertilized. I should probably bring up that certain genetic or health concerns may be more likely with particular methods of fertilization or development.
There are many ways in which single eggs can end up yielding multiple children, including the potential for children fathered by two different men.
The likelihood of that fairly exotic outcome is perhaps incalculable because the mechanisms are not fully understood and documentation is thus far sparse. I think it is safe to say that it has happened before, in human history, but being noticed and documented is another matter. Given the rigorous journey, in terms of effort, obstacles, and other complications, sperm already tend to have a pretty hard time making it to the egg and successfully fertilizing it.
Most sperm are not up to the task of making it to an egg at all, whether due to their traits or their circumstances, and those that do make it to an egg will not necessarily be received by it.
Having the sperm of more than one man involved in the situation may or may not increase the odds of pregnancy, or of less common outcomes of fertilization itself. We are dealing with a dynamically interactive organic system—an entire environment with many different factors which can impact the likelihood of conception and the favoring of particular sperm both individually and genetically speaking.
Fertilization and impregnation is not actually a blind lottery. Beyond Pregnancy I think it should also be mentioned that there is plenty to consider besides just pregnancy and paternity here. We have to consider the risks of STDs sexually transmitted diseases , the potential for things like sperm allergy including an allergy to one man but not the other or various autoimmune conditions, and so forth. Because human beings are unique, it is not feasible to consider the sperm of one human as interchangeable with the sperm of another.
Without more details as to who this woman is and who these sperm donors are and what sort of actions transpired to result in the sperm being inside her, it is hard to say much about the possibilities. Everything from injury to synergistic improvements in mood to the risk of medical illness can be discussed. Focus, relevance, and how we decide to measure things all need to be determined beforehand. Additionally, this post has thus far been speaking to sperm introduced to the reproductive tract as through certain forms of sex and artificial insemination.
This is not always a single place, but unconventional implantations tend to be unsuccessful pregnancies and can even be life-threatening medical conditions. In extreme rare case she can be pregnant with a twin with both the kids belonging to 2 different men.