Which of the following is a pregnancy test used to find fetal hormone HCG in urine using anti-HCG and latex spheres?

The correct answer is Pregnancy test kits.

Pregnancy test kits are used to detect the presence of human chorionic gonadotropin (hCG) in urine or blood. hCG is a hormone that is produced by the developing placenta after implantation of a fertilized egg. The presence of hCG in urine or blood indicates that a woman is pregnant.

Pregnancy test kits work by using antibodies that bind specifically to hCG. These antibodies are typically attached to latex spheres or other solid particles. When urine or blood is added to the test kit, the antibodies bind to any hCG that is present. This causes the latex spheres or other particles to clump together, which can be seen as a visible line or band on the test kit.

Pregnancy test kits are available over the counter and can be used at home. They are a simple and convenient way to test for pregnancy.