Tetracycline when given to pregnant women can cause
**Core Concept**
Tetracycline is a broad-spectrum antibiotic that can inhibit protein synthesis by binding to the 30S subunit of the bacterial ribosome. However, tetracycline can also interfere with bone growth and tooth development in fetuses when administered to pregnant women.
**Why the Correct Answer is Right**
Tetracycline can bind to calcium ions, which are essential for the development of bones and teeth in the fetus. This binding can lead to the inhibition of osteoblast activity and the formation of abnormal teeth and bones. The mechanism of tetracycline-induced tooth discoloration is thought to occur due to the incorporation of the antibiotic into the enamel matrix during tooth development. This can result in the deposition of tetracycline pigments, leading to discoloration of the teeth.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not specified, so it cannot be evaluated.
* **Option B:** While tetracycline can cause phototoxicity, this is not the primary concern when administering the antibiotic to pregnant women.
* **Option C:** Tetracycline is not known to cause teratogenic effects such as cleft palate or heart defects.
* **Option D:** This option is not specified, so it cannot be evaluated.
**Clinical Pearl / High-Yield Fact**
Tetracycline and other tetracycline analogs should be avoided in pregnant women, especially during the second and third trimesters, to prevent potential harm to the developing fetus.
**Correct Answer:** C. Tetracycline-induced tooth discoloration and inhibition of bone growth are well-documented side effects of tetracycline administration to pregnant women.