Actually, the idea of one section of the community being offended isn't quite right.
The pamphlet is being altered to reflect everyone and exclude no-one.
And here's another important point - lots of heterosexual couples refer to their other halves as partners.
Has anyone actually looked at the website?
This is how it reads:
This website is designed to be a comprehensive online resource for you and your partner from the decision to start trying for a baby, through pregnancy, labour and birth up until your baby is 12 months old.
So the audience for the site is the expectant parent.
Doesn't this seem a lot more clumsy:
This website is designed to be a comprehensive online resource for you and the father of your baby from the decision to start trying for a baby, through pregnancy, labour and birth up until your baby is 12 months old.