Gestational stage | Position adopted | Type of muscular contraction | Number of contractions | Contraction sustaining time (s) | Muscle relaxation time after contraction (s) |
---|---|---|---|---|---|
From 20 weeks until birth | Standing | Slow | 8–10 | 8–10 | 8–10 |
Fast | 5 | 1 | – | ||
Sitting | Slow | 8–10 | 8–10 | 8–10 | |
Fast | 5 | 1 | – | ||
Lying down | Slow | 8–10 | 8–10 | 8–10 | |
Fast | 5 | 1 | – |