As a father with three kids I'm an expert on getting those babies out, none of ours came on time.
First you get a quart of Castor Oil.
Second, have wife drink Castor Oil.
Third, drive down any available rutted dirt road(the rougher the better) as fast as you can in your old pickup with wife firmly strapped I n.
This has a 100% guaranteed rate of success???not necessarily of getting the baby out. Seems when you try to get the oil down her and tell her your brilliant scheme she gets so mad and runs after you it induces labor