Superfecundation

Have you heard of it?

Up until recently, I had never heard of superfecundation, and therefore had no knowledge about it.

It is rare, and something I now consider rather fascinating.

Put simply, superfecundation is when a woman is pregnant with twins, but not by the same biological father. Yes, you read that right.

To explain, if a woman has sexual intercourse with more than one man, it is possible for two eggs (ova) from the same cycle to be fertilised by the sperm from two men. 

The twins are referred to as fraternal twins. Pre-natal DNA testing during pregnancy or paternity testing (after twins are born) is how fraternal twins are identified.

Currently, there is a UK drama series with an ongoing superfecundation storyline, which is how I first heard of it. More recently though, I found myself watching a Brazilian drama series on Netflix, which went into it in a bit more detail.

To be pregnant and in doubt about who the biological father is, is bad enough. I can only imagine what an absolute nightmare it would be to be pregnant with fraternal twins, especially if the biological fathers had both been informed. In addition, I wouldn't envy anyone trying to explain superfecundation to fraternal twins. In my opinion, it would be hard to wrap one's head around.

  • Two fathers, two lots of child support!

    Not necessarily, as it would depend upon the circumstances.

    For example, the father of one twin could be a boyfriend/husband, but the father of the other twin could be someone unknown who had taken advantage of a woman (i.e. non-consensual intercourse).

  • It gets even weirder, apparently the cervix has holding cells for sperm so it can delay them getting into the womb and can hang on to them for a few days, it's possible its testing them for viability, it's still being researched.

  • one can but dream!

  • This is common enough when the woman is freely engaging in sex with and when who ever she likes.   

        Ovulation lasts a few days a month so it's not hard to imagine a couple of willing ovum hanging around in the uterus, in the market for some sperm, introspective of the contributor. All the little seprm have to do is show up and get in the door,  et voila = Zygote! 

  • Why would that be a bright side? You don't think that there could be financially independent women out there who are capable of raising any children they have without the need for finanical input from a man?

  • Look on the bright side.

    Two fathers, two lots of child support!

  • Yes, I'd heard of it before it often goes along with another rare condition, where a woman has two wombs and can be pregnant not just by different men, but have babies of different gestational ages.

  • Just WOW. I've never heard of this before either. It's fascinating! You really do learn something new every day.