Changes

'''Human reproduction''' is the mechanism by which we perpetuate our species.   

'''Human reproduction''' is the mechanism by which we perpetuate our species.   

In order for human reproduction to occur, a male and female (man and woman) of the species must cooperate in the act of sexual congress.  Most cultures enshrine this activity within a union we call marriage, a lifelong, legally sanctioned, bond between one man and one woman.

In order for human reproduction to occur, a male and female (man and woman) of the species must cooperate in the act of sexual congress.

The sexual act serves to unite the male and female gametes, the sperm and egg, respectively.  These gametes carry just one half of the genetic material (chromosomes) from each parent, and when they combine the new embryo contains a full set of chromosomes.  The process of gamete combination is called fertilization, and takes place inside the woman's body, in the fallopian tubes or uterus.  The embryo then attaches itself to the uterine lining, and is nourished by the woman's body while it develops.  This development takes roughly nine months.

The sexual act serves to unite the male and female gametes, the sperm and egg, respectively.  These gametes carry just one half of the genetic material (chromosomes) from each parent, and when they combine the new embryo contains a full set of chromosomes.  The process of gamete combination is called fertilization, and takes place inside the woman's body, in the fallopian tubes or uterus.  The embryo then attaches itself to the uterine lining, and is nourished by the woman's body while it develops.  This development takes roughly nine months.