 [ Symptoms ] i have the mirena iud and recently i had unprotcect sex could i be pregnant  my partner didnt pull out before ejaculating and no other form of birth control was used sorry for the over share but i need a straight answer [ Disease ] not a blood test but a dna swab from the inside of your cheeks or saliva can determine if you have male or female chromosomes if a person has a sex change    surgically and hormonally challenged    the chromosomes do not change nor can they be changed the olympics uses this type of test to determine eligibility to compete