I did not know for number one, a girl. The next time I found out, another girl, but could not relax the whole time thinking what if they got it wrong (it happened to quite a handful of my close friends) So I still never connected to her being a girl or felt that I could bond any better. The third time, I did not know, (another Girl) life was busier with the other two children and I had to really take the time to connect with her whilst pregnant and make more of an effort. Bonding is non stop, and happens for the rest of their lives, I would not say that ultrasounds and knowing the sex can help with that. I believe it is a consciousness and a doing in each and every moment.