Number of sperm generated by a male over his lifetime (per generation) with the potential to make a human:

1.25 X 10⁸ sperm X 3.65 x 10²days Xx         50 years         x=  2.3 X 10¹² sperm

            day                    year               sperm production            lifetime

                                                               per lifetime

Number of ova (primary, not primordial oocyctes) ovulated by a female over her lifetime (per generation) with a potential to make a human:

1 primary oocyte X 12 months Xx         40 years         x=  480 ova

          month              year             ova production          lifetime

                                                       per lifetime

The probability of you:

                                            1                               1                               1                       1

2.3 X 10¹² sperm     1.5 X 10⁹     480 ova       1.5 X 10⁹  =   2.5 X 10³³ unions of sperm & ova

      lifetime         X   males*    X lifetime  X  females*          that could have occurred in world

       male                 world        female         world              over the potential time of your

                                                                                        conception (i.e., per generation)

*these were the number of reproductively active males and females in world at the time of your conception.  Since any two of them theoretically could have been your parents and since you could have been conceived at any time over their active reproductive lifetime (per generation), this is one way to compute this number.   1.5 X 10⁹ is a SWAG.  The figures on the number of sperm and ova per lifetime are reliable. 

This means you are one out two and one half thousand quadrillion, quadrillion!!  But since we did do some guessing, let's round that number down to one thousand quadrillion, quadrillion.  To say you (or anyone else, including recently-conceived humans) are unique is one of the world’s biggest understatements!

So if anyone is questioning his/her uniqueness or importance, remind him/her of the above fact. 

Psalm 139:13 tells us, “For you [God] created my inmost being; you knit me together in my mother’s womb.” 

I believe this knitting begins with His personally selecting the sperm and ovum that made us, out of the one thousand quadrillion, quadrillion that He could have chosen.  I believe it continues throughout our in utero development following thoroughly-reasoned instructions, imparted over hundreds of millions of years of evolution.  I believe it culminates in the miracle of our birth!

Life begins at conception!  Any event with a probability of one out of one thousand quadrillion, quadrillion is not to be trifled with!

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