Frequency of Braxton Hicks contraction is –
**Core Concept**
Braxton Hicks contractions are mild, intermittent uterine contractions that occur during pregnancy, typically between 20 and 40 weeks of gestation. These contractions are a normal physiological response to pregnancy, preparing the uterus for labor. The frequency and intensity of Braxton Hicks contractions increase as the pregnancy progresses.
**Why the Correct Answer is Right**
Braxton Hicks contractions are characterized by their irregular frequency, which can vary from one pregnancy to another. However, they are generally reported to occur every 10-30 minutes, with some women experiencing them as frequently as every 5 minutes or as infrequently as every 1-2 hours. The frequency of these contractions is influenced by factors such as hydration levels, physical activity, and the stage of pregnancy.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is too low, as Braxton Hicks contractions are not typically as frequent as every 1-2 minutes.
**Option B:** This option is too high, as Braxton Hicks contractions are not typically as frequent as every 1-2 seconds.
**Option C:** This option is incorrect, as Braxton Hicks contractions are not typically as frequent as every 1-2 hours.
**Clinical Pearl / High-Yield Fact**
It's essential to note that Braxton Hicks contractions are often accompanied by a hardening of the uterus, which can be felt during a pelvic exam. This sensation can be mistaken for true labor, but Braxton Hicks contractions are usually painless and do not cause cervical dilation or effacement.
**Correct Answer: C. 10-30 minutes.**