I started my own business just before I got pregnant and I remember telling my business partner I would be back at work 3 weeks after the baby was born. Looking back at that time, I realise I was a little delusional. Even though I ran my business from home, there was no way I was ready to go back to work - I was sleep deprived and trying to juggle too many balls. So I would say, unless you have a full time nanny, give yourself a minimum of 6 months off, and if you can 12 months. For me it's now 12 years on and I still can't fit into my pre-baby office suits.