Elaine Chao has just been nominated Secretary of Transportation by Trump.

That's two women in the cabinet (Secretary of Transportation, Secretary of Education), and three women holding cabinet-level positions (those, plus UN Ambassador). Plus, one of them (SecEd) is an ugo so it's not like he's just appointing women he can grab by the pussy.
There are 10 cabinet positions left to fill; if Trump appoints just one more woman he'll have tied the number of women currently in Obama's cabinet. If he appoints two he'll have bested Obama.