If your baby really doesn't like being on her tummy, leave it for now and try again another time. Bear in mind that babies develop differently, some more quickly than others. If your baby isn't rolling over by the time she is six months or seven months old, talk to your GP or health visitor.
Some men stop growing at 18, some at 21. Some men grow really quickly early on, and slowly grow taller until they have hit somewhere between 18 and 21, while others grow quickly later on and some just grow gradually. So, only time can tell you, no one else can because everyone is different.
Male Growth Patterns. Boys generally hit their growth spurt about two years after girls, according to KidsHealth.org. Most boys grow most quickly between ages 12 and 15 and stop growing by age 16, but this depends on when they reach puberty. Boys usually continue developing muscles and gaining weight after they stop growing taller. The average adult male in the United States is about 69 inches tall, according to the CDC.