Dick is having a daughter.
Yesterday on
episode 440 Dick openly talks about "his daughter" and not "his baby", which means that he now knows the sex of the child.
Since he knows it so early, it most likely mean that he did an NIPT test to make sure the child is not a downie, which is the smart thing to do since Maria is 40 years old and ongoing a geriatric pregnancy. We can also conclude that he intended to kill the child if he or she was chromosomically enhanced ; no reason to pay for the test if you don't intend to act on it if it's positive.
For those that don't know, an NIPT test is an expensive test that can be done starting at the 9th week of pregnancy to look at the chromosomes of the child and verify that they look normal. Since it looks at the chromosomes you can of course determine if it's an XY or XX.