There are a lot of ways of looking at it really. I suppose hindsight is always a wonderful thing. I always wanted two but was told I could only have one. When it came down to it though my eggs were not perfect and so two were put back because of that. It does depend on embryo quality a lot of the time. If one is perfect then they reckon it's better to go with one. If two are not so perfect then you are getting a better chance if both are put in. Apparently.
Now I have ridiculously been doing a lot of research lately but I really am in a Catch 22 situation, here. I have read that if you get pregnant with twins and one does not form/dies/messes up then there IS a chance of it affecting the other one. There is also a chance of going on to carry through a healthy pregnancy but studies have shown that a percentage of women who lose one twin will go on to lose the other one. I suppose these studies are very subjective since it could go one way or the other but unfortunately I have to ask myself if mine went the 'bad' way.
One of my 'twins' is a full sized 9 week old blighted ovum and the other one is now dead, forming only to around 5 weeks. I'm waiting to miscarry both. I have to ask myself did the one twin that blighted affect the other one; was I one of the unlucky people whose living baby was affected directly by the fact that the other embryo implanted and then messed up? There is such a thing as vanishing twin syndrome, where one does not make it and the other one forms perfectly, but there are also studies which suggest the body spends so much time trying to 'right' the 'wrong' one before giving up on it that the other baby suffers as a direct result. My blighted ovum is still growing. The baby that formed? Well, it's not.
But then, on the other hand, I also have to ask myself if only ONE had been transferred, would that have been the blighted ovum anyway? There was a 50/50 chance that it would've been. Then again there is a 50/50 chance that it WOULDN'T have been.
There is no guarantee the baby that formed would have survived if it had been transferred alone - but, it's something that truly does mess with my head.
Then there is the fact that it's more common to miscarry twins and yada yada yada...
I was quick to opt for two embryos transferred. I don't know if I'd do that again. I was so obsessed with that extra 5% that they quote - but now I wonder if it truly IS the be-all and end-all.
There are always risks. There are plenty of people who go through IVF and successfully carry twins. There are a few on here. I suppose I was unlucky in that sense, but it is good to know the pros and cons beforehand. If I do this again and there IS one perfect embryo, I'm getting just the one transferred. But, I was like most people beforehand, always preferring two. Like I said, hindsight is a wonderful thing...