William and Kate, The Duke and Duchess of Cambridge, were "very pleased" to announce today that they are pregnant with their third child.  Kate's due date is expected to be in late April, but she has made the announcement early due to severe morning sickness.   

He or she will be a sibling to the couple's other two children, George (4) and Charlotte (2), and will become the fifth in line to the British throne.

With the announcement, Kate and William are bucking the trend in the United Kingdom, which has a total fertility rate of 1.89 children born per woman.  As in so many other things, will people follow the popular princess in her decision to have a third baby?  Already people seem to be following the couple's choice of names, with Arthur or Alice currently top picks.

Perhaps in the lead up to being a father of three, William might appreciate some family advice from the Prime Minister of New Zealand, Bill English.  The father of six uploaded this casual chat about fatherhood with his son on Father's Day this week.  

His advice to new father's includes not getting too worried about difficult stages, especially when you're overwhelmed by tiredness, as all things pass.  He also praises the fact that many young fathers are now much more involved than they perhaps were in the past, with most no longer strangers to changing nappies.  I'm sure Prince William is no exception.  

English ends by saying that parents have a much bigger impact on their children than they realise "just by doing the normal things with a bit of goodwill and cheerfulness".