A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes. gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.
True labor contractions last more than 30 seconds at the onset and get progressively longer, up to 60 seconds, whereas false labor contractions vary in length and intensity.
What's going on: Your baby is moving down the birth canal. Contractions continue to be strong, lasting for about 60 seconds and coming 3 to 5 minutes apart. You will likely feel a strong urge to push. How long it lasts: 1 to 2 hours for a first labor; 15 to 30 minutes for subsequent labors. If your baby is in distress at this point, or if she doesn't seem to be making her way through the birth canal, your doctor may decide to deliver her by c-section or use forceps to help her out.