Frank tells April that she could not have been conceived by Steve McQueen as he spent May to October 1966 filming "The Sand Pebbles" along the Yangtze. However, Americans were effectively barred from mainland China at the time. "The Sand Pebbles" was filmed in Taiwan and Hong Kong.
When April picks up Frank in her car outside his house, both the driver side and passenger side windows are up. But every time the camera is behind either of their heads while they're talking in the car, you can see their hair blowing from the wind coming through the open car window where the camera is mounted.
Barbetta is on 46th between 8th and 9th. Traffic goes west to east. But when they come out of the restaurant and walk to the car (which would be going east) the cars are all parked going west, and April backs her car up from west to east. There are also no clothing boutiques along that stretch of the street. And the cosmetic counter where Bernice says she worked would not be towards the Hudson where she points.
The ultra sound picture at 6 weeks is not developmentally correct. At 6 weeks, you would be unable to distinguish the baby's features (hands, spine, etc). The baby would look more like a bean in shape.