When Ross is messing around in the other bed in the semi-private room, while his legs are in the air you can see a white speck on the bottom of his shoe. In the next shot, the speck is gone. The speck continues to appear and then disappear.
This may be a Netflix cut, but when Ross's mother arrives, he rushes out, leaving Rachel behind. She tells him, "My child has no father!" - as she's saying this, just before the cut to the hallway, a glove can be seen in the top right corner of the screen.
In The One with the Cheap Dress, Monica says that her wedding is on May 15th - which means that Rachel got pregnant in April, because she is about 5 to 6 weeks along at the time of the wedding, so she should give birth in January or early February. But she gives birth when it is hot outside, because she is complaining before she goes to the hospital how hot it is. She is pregnant for almost a full year.