We have a 3 year old son and a 4 month old daughter. I always wanted "1 of each", but when I found out we were having a girl, although I was pleased, I also felt really sad that our little boy wouldn't have a little brother. I'd built up the idea it might be another boy in my head - I think I'd sold it to myself a bit too well as I did really want a girl.
I think, for me, it's really the finality of knowing this is my last pregnancy. I lost 2 pregnancies last year and I think somewhere deep down I'll always long for those babies. I didn't know their sexes. It's as if I could never have enough, if that makes any sense.
Logically, with a newborn and a toddler, and all of the covid stuff, edging ever-closer to more lockdowns, I know very well that we have enough on our plate! I'm not really someone who 'enjoys' being pregnant, and I am very grateful for what we have. My last pregnancy was a nightmare - every day I was terrified I would lose her - yet my biological clock is screaming for more. But if I did have another boy, I know I'd want another girl, and vice versa. It's completely illogical because, having one of each, I can honestly say the only difference is clothing colour. It's brilliant watching their little personalities develop, girl or boy.
I'm 42 and wouldn't try again, but the urge is strong, despite it making absolutely no sense whatsoever.