For prevention of pre term labour in a patient with a history of a preterm delivery the following is used :
**Core Concept**
The use of a specific medication for the prevention of preterm labor in a patient with a history of preterm delivery is based on the concept of cervical ripening and uterine relaxation. This is achieved by inhibiting the action of prostaglandins, which are hormone-like substances that promote uterine contractions and cervical ripening.
**Why the Correct Answer is Right**
The correct answer is **Cerazette (Desogestrel)**. Cerazette is a progestogen-only pill that is used for contraception, but it also has a role in preventing preterm labor. It works by maintaining the integrity of the cervix and uterus, thereby reducing the risk of preterm birth. This is achieved by promoting the production of progesterone, which has a stabilizing effect on the cervix and uterus.
**Why Each Wrong Option is Incorrect**
**Option A:** This is incorrect because **Nifedipine** is a calcium channel blocker that is used to relax the uterus and prevent preterm labor, but it is not the primary choice for a patient with a history of preterm delivery.
**Option B:** This is incorrect because **Atosiban** is an oxytocin antagonist that is used to prevent preterm labor, but it is not the primary choice for a patient with a history of preterm delivery.
**Clinical Pearl / High-Yield Fact**
A patient with a history of preterm delivery should be offered a progestogen-only pill, such as Cerazette, for the prevention of preterm labor. This is because progestogens have a stabilizing effect on the cervix and uterus, reducing the risk of preterm birth.
**Correct Answer: C. Cerazette (Desogestrel)**