如何計劃寶寶性別

記得當初等待寶寶出生時猜測寶寶的性別是一件非常開心的事。 一晃這許多年過去，周圍已開始有朋友的孩子也步入婚姻了，也許過幾年這些朋友就會升級做祖父母。

下麵的方法僅供“預科班”祖父母們一笑，如果用了且如償所願，那就皆大歡喜！

The Shettles Method is based on the fact that the Y chromosome bearing sperm ( boy sperm ) are smaller and less robust but move faster than the larger X chromosome bearing sperm ( girl sperm ).

Step 1
Determine the time of Ovulation

You can get Ovulation Predictor Kit from any pharmacy store like CVS. This kit detects LH (Luteinizing Hormone) released by body as a precursor to ovulation. Dr. Shettles suggests testing twice a day to make sure you catch the surge as early as possible. He recommends testing once between 11am and 3 pm and then again between 5pm and 10pm. When all factors are considered, ovulation will most likely occur about 24 hours after the time when you get a positive result for the LH surge on your ovulation predictor kit.

Step 2

for baby boy
Try conceive baby between 24hr before ovulation to 12 hr after ovulation. The closer timing to ovulation, the easier for the faster but less robust Y sperm to get to the egg.

for baby girl
Try conceive baby around ovulation but outside the optimal window for baby boy. The further time away to ovulation (albeit still close enough to conceive), the easier for the larger slower but more robust X sperm to get to the egg.

http://www.babyhopes.com/articles/how-to-conceive-a-boy.html

Good Luck!