the $75K taxable income threshold in the 6 months prior to the birth
Aaaarrrgggghhh, you freaked me out for a minute. I was sure last time I read it it said it was the taxable income in the 6 months after the birth of the child but I checked and that is what it still says. It's the difference between us getting it and not getting it.

have adjusted taxable income of less than or equal to $75,000* for the period of 6 months from the date of birth of the child or six months from the date that the child entered into your care
Even so, with my paid maternity leave we'll go just slightly over if I'm not careful.