This is the genetics: " W) _' @% v1 L; B* E8 ]' R: D$ h# a" |
XY(man) x XX(woman) = 4 I' O3 c/ x0 y" yXX or XY, XX or XX, XY or XY. Some people have a twin. 3 Q& |4 Q6 I- x& N3 d( P6 w8 f$ y% t, e
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.( C+ c* u1 w& w' Y& z0 q7 h
9 C. [4 [9 P! }6 d1 s$ U% ~Becareful, eating drug may cause mutation although the possibility is not so high.