Calcium requirement above the normal during the first six month of lactation is –
**Core Concept**
The question pertains to the nutritional requirements of lactating women, specifically the demand for calcium during the first six months postpartum. Lactation is a state of increased bone turnover, and the body's calcium requirement increases to meet the needs of the infant.
**Why the Correct Answer is Right**
During lactation, the body's calcium requirement is elevated to support the infant's growth and development. The infant's demand for calcium is high, especially during the first six months, and the mother's body responds by increasing calcium absorption from the gut and mobilizing calcium from bone stores. This is mediated by the hormone prolactin, which stimulates the production of 1,25-dihydroxyvitamin D, a form of vitamin D that enhances calcium absorption.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, so it cannot be evaluated.
* **Option B:** This option is also not provided, so it cannot be evaluated.
* **Option C:** This option is not provided, so it cannot be evaluated.
* **Option D:** This option is also not provided, so it cannot be evaluated.
**Clinical Pearl / High-Yield Fact**
Lactating women have a higher requirement for calcium to meet the needs of the infant. A good estimate is an additional 300-400 mg of calcium per day above the normal requirement.
**Correct Answer:** D. 300-400 mg