"People need to be very responsible about these things and not to get caught up in scare stories but instead take a reasoned and logical consideration of it and do what's best for their child, " he added.

BBC: Boy with measles

Just to make up numbers entirely to make the logical point, say that this part time work lasts until a child is 10, they have two at a 4 or 5 year interval (all reasonable enough numbers but entirely made up as I say).

FORBES: The Problem With Female Doctors