I did several searches for this film which I saw in color on old analog TV without success.
What I remember is this:
There is a pregnant woman on a small boat with a man and they get zapped by two aliens in a ship and turned into several cubes. The cubes are brought on board where they are reintegrated into people, but the women's child is still in one of the alien's stomach and can't be tranfered back to the woman at that time.
Elsewhere, some aliens with cone shaped heads have captured a human and one of the aliens vanquishes a large animal (the creature gets a rock stuck in it's throat), and is granted his request to invade earth.