My mum asked me whether IVF increased rates of a certain gender since biologically females embryos are usually stronger. Don't know, hadn't considered it... but found an interesting article that indicates it does!!!
'Natural' (mix egg and sperm in the dish...) IVF had an increased rate for boys 56.1% (but only just above natural conception 51.5% for boys) which is 43.9% for a girl in 'natural' IVF.
ICSI had an increased rate for girls- dropping from 51.5% boy ratio for natural conception to 50% in ICSI- 50% for a girl using ICSI.
Interesting! what have you read/ been told about gender balance?
Here's the article:
Another similar article: