[m23khan]

The studies are certainly interesting but as Father myself, I would chime in my 2 cents worth:

- less sleep which causes elevated levels of stress which pushes you to eat unhealthy food more, combined with your Body's natural slowdown of digestive system as one ages (compounded by less sleep) will definitely hit Dad's biology quiet a lot for at least the first 3 years of a Child's life.

- Icing on the cake is the hit it takes on Dad's IT career (if Dad is in IT) as he is unable to dedicate meaningful number of after-hours for his skill upgrading.

- Modern Society (at least in Toronto Canada) places unreasonable expectations on Dads to partake in expensive/time-sink activities with their kids such as organized sports and other extracurricular activities as opposed to having kids in neighborhood naturally play at each other's house / local park. This to me is a problem because I am naturally inclined to work and focus on making money/getting promotion rather than extending my family time.

- Raising a Child, especially in a society that is comprised of nuclear family structure and where Grandparents (Wife's Parents) are not geographically near causes immense pressure on both Parents. No wonder, people, especially immigrants in Toronto Canada, rarely have more than 1-2 kids...