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.
1 At the same time your contractions usually become more regular, around three or four minutes apart and last up to a minute or so. 2  The cervix dilates to around 7cm. 3  This is usually considered to be the start of true labour. 4  The transition phase-the contractions become more intense, painful and frequent.