nnw890

You are talking about two eggs being fertilised by sperm from different fathers. This is not the same as 2 sperm fertilising one egg, which causes triploidy and is incompatible with life

Yes that’s all true. Triploidy is where ALL 23 chromosomes are tripled because 2 sperm have fertilised one egg or egg has duplicated chromosomes before fertilisation. That’s what happened in my pregnancy. Baby doesn’t look like an alien. Looked surprisingly normal on 12 week scan. All organs there, heart beating healthily, head looked normal, arms, legs, fingers, toes. But as you say it’s not compatible with life. Triploidy babies have lived a few hours after birth at best.

Sevenperforce, as I said, in most cases of triploidy, 2 sperm fertilise the egg and fuse with the nucleus, meaning that the fetus has 3 sets of chromosomes instead of 2. 2 paternal sets (from each of the sperm) and 1 maternal set. A chemical reaction in the egg should only allow one sperm and close off to all others, but occasionally this does not happen. It is this malfunction that causes the fetus to be incompatible with life, though in some cases it can survive until shortly after birth

When 2 sperm fertilise 1 egg it is called diandric triploidy. It causes the embryo to have 2 sets of paternal chromosomes instead of 1 and therefor 69 chromosomes rather than 46. In my case, I had a 12 week scan. Baby had all organs, healthy heartbeat, arms and legs and was moving around. The only alarm bells were increased fluid behind the neck, measuring a few days smaller than expected and the placenta not looking quite right. It took a blood test and a biopsy of DNA from the placenta to confirm triploidy. Often the baby will miscarry or will be a stillbirth. Occasionally, babies live a few hours or days after birth and look relatively normal but very small. One baby lived to 10 months old. Yes it’s like something from a horror movie but not in the way that you think. It happens in 1-2% of pregnancies. Heres a link so you can all educate yourselves: