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 to expect: 1  Active labor will last about 3-5 hours. 2  Your cervix will dilate from 4cm to 7cm. 3  Contractions during this phase will last about 45-60 seconds with 3-5 minutes rest in between. 4  Contractions will feel stronger and longer. 5  This is usually the time to head to the hospital or birth center.