Oxytocin
An activin is a peptide which participates in the regulation of the menstrual cycle.
Labor contractions might be the best term but not all contractions are painful.
Yes, labor contractions are an example of positive feedback. The contractions cause the release of oxytocin, which further stimulates increased contractions, resulting in the progression of labor. This cycle continues until the baby is born.
The strongest indication that contractions are occurring in association with true labor is that the contractions begin to occur at regular intervals. This is contrary to Braxton-Hicks contractions, which are spontaneous, random uterine contractions that do not occur with actual labor.
Labor contractions are painful and you can't ignore them. If they are not painful then they are just Braxton Hicks.
The best indicator of true labor is the presence of regular, rhythmic contractions that progressively increase in intensity and frequency. These contractions typically lead to cervical changes, such as dilation and effacement. Unlike Braxton Hicks contractions, true labor contractions do not subside with rest or hydration. Monitoring these patterns can help differentiate true labor from false labor.
Contractions
False labor, or Braxton Hicks contractions, refers to irregular and often infrequent contractions of the uterus that can occur during pregnancy. Unlike true labor contractions, Braxton Hicks are typically not painful and do not signal the onset of labor. They are often described as a tightening of the abdomen and can occur at any point in the second or third trimester. These contractions serve to prepare the uterus for the eventual labor process.
A tightening of the uterus during pregnancy. Contractions may or may not be painful and may or may not indicate labor.
painful
The muscular contractions that occur before birth are called Braxton Hicks contractions. These are also known as "false labor" contractions and help to prepare the uterus for the actual labor process. They are typically irregular and can vary in intensity, serving to tone the uterine muscles and promote blood flow to the placenta. Unlike true labor contractions, Braxton Hicks contractions do not lead to cervical dilation.
There are no "fake contractions," except when women pretend to be in labor. There is false labor, which is contractions (usually mild and irregular) which do not change the cervix. (Labor is defined as progressive change--dilation and effacement--of the cervix.) Braxton Hicks contractions are real contractions, but very irregular. They can occur any time after 32 weeks of pregnancy, and are usually no more than 2 to 3 an hour.