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.
Remember, you're the only one who can judge your need for pain relief. How long it lasts: Active labor often lasts up to eight hours. For some women, active labor lasts hours longer. For others â especially those who've had a previous vaginal delivery â active labor is much shorter.