Following DS1 me and DH didn't have sex for about 13 months. Maybe it was the breast feeding every two hours for 10 months that put me off alongside the absolute exhaustion but sex wasn't on my radar at all.
When DS was 10 months old I put him in his own room and sleep trained him and it meant me and DH started to get our evenings back. At this point we'd also been in separate bedrooms for about 4 months due to me needing to co-sleep and feed constantly throughout the night so obviously that hadn't helped matters either.
When DS was 12 months old I was starting to feel more human and after sorting out contraception we were able to start having sex again after 13 months. It felt very odd.
I was still breast feeding DS and if I'm honest this still dulled my sex drive for a very long time. I see to be the one with the higher sex drive in our marriage but things changed after DS came along.
I breast fed for 2.5 years and if I'm honest, during that whole period I never had any strong urges for sex. I enjoyed it when we did it (still infrequently) but I never deeply 'wanted' it.
When I stopped breast feeding altogether after the 2.5 years I felt my sex drive start to normalise but then I fell pregnant within 8 weeks and so the cycle starts again 
The baby is due in 4 weeks and I think my DH is expecting a similar sex draught this time too.....as am I!