孩子的性別在懷孕早期就已經確定了，當精子和卵子結合的時候，沒有什麼因素可以在懷孕期間改變性別。儘管如此，孕前的性別選擇或孕前寶貝性別的影響因素見諸於各種報道之中。
經過數十年的研究，在環境因素影響寶貝性別方面仍有很多爭議。至今所達成的共識是，飲食的影響是有限的。以前的研究顯示，要當媽媽的的人飲食中多吃含鉀和鈉高的蔬菜、香蕉、魚、肉有利於生男孩；飲食多吃含鈣和鎂高的牛奶、豆類、穀類、奶酪和堅果有利於生女孩。
由於飲食對寶貝性別的影響很小，所以最好的建議就是無論是在孕前還是在懷孕期間，都要保持健康的飲食。
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The sex of the baby is determined at the moment of conception, when the sperm and the egg join. Nothing during pregnancy will change that.
However, pre-conception gender selection, or the influencing of the sex of the baby before it is conceived (so as to make it more likely to have the baby of your choice) is getting a lot of press lately.
After decades of research, there is still much controversy over the environmental factors which determine the baby's sex. As related to what one eats, the consensus today is if there is any dietary influence, it is limited.
Previous studies have shown a mother-to-be's diet high in potassium and sodium including vegetables, bananas, fish and meat may favor the conception of a baby boy. A diet high in calcium and magnesium including milk, beans, cereals, cheese and nuts may favor a baby girl.
Because of the minimal influence if any on the outcome of the sex of the baby, the best advice is to eat a healthy diet during the time you are trying to get pregnant and then all through pregnancy.
