This is the genetics:$ ~! X7 \$ k! w& j( R
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XY(man) x XX(woman) = k& ~+ U. O6 R2 y0 X8 U; p8 eXX or XY, XX or XX, XY or XY. Some people have a twin. & I* y& C- _, a
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If you really need a boy, you can ask a doctor to take your Y only and injiect into your wife's XX, then you will have boy only.8 f- e. g0 Q) b. p, n: s$ O: D, }
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Becareful, eating drug may cause mutation although the possibility is not so high.
Autumn:你好!4 p/ @; n% e1 S( @0 d E4 j3 H
据我分析,生男生女取决于做爱时的姿势,体力,和之后的工作。理由如下:1。男精子活跃但不持久。就象运动员一样,男精子是短跑选手,女精子是长跑选手。如果作爱时男方插的较深,容易得男孩。因为男精子一冲则就。所以说姿势重要。具体啥姿势就自己参祥。2。同样道理,男方体力要保证。3。完事之后,女方不易短时站起。可增加受孕机会。4。算好时间,女性主宰性生活多为男孩,应在女性情期稍后,双方连续不断努力,则一蹴而就。- F. M) u/ g4 d' F7 ?
祝你如愿!成功告我一声。