Psychological effects of father being primary caregiver?

Long story short I've been the primary caregiver of my twins since they were 3 months, now they are a year old.I've been very loving, and have done everything in my power to be a good father to them. Many sleepless nights, frustration, initially I felt like why me. I felt sorry for myself, it was hard and I'm over that.What scares me is possible psychological effects of the mother not being around during one of the most crucial periods. Lots of what I've read have stressed how important it is for babies for their mother to be around for them to develop properly socially, emotionally, and cognitively. I want them to be happy and live normal lives and off the bat of their existence that wasn't the case, like I've said I'm done beating myself up over it because it gets me no where. Yet I can't help but think about the implications of this situation showing up down the road.On the outside they seem very happy, their attachment towards me seems healthy and normal. I try my hardest to be as loving as possible. I have fun with them. So I guess I'll ask has anyone gone through anything similar? Did you notice any behaviors later in your child's life that may have been caused by said situation? How and when did you notice and how did you deal with it? Can a man really replace a woman in the nurturing department? Thanks for your replies! via /r/Parenting http://ift.tt/2gPvvgD