Final answer:
Urine and blood pregnancy tests, which detect the hormone hCG, are generally considered reliable for confirming pregnancy. Lateral flow urine tests indicate pregnancy with lines appearing on both control and test areas. A fetus can produce urine, but the umbilical artery carries deoxygenated blood to the placenta, not to the fetus.
Step-by-step explanation:
True or False: Urine and blood pregnancy tests are enough evidence to be certain of pregnancy. This statement can generally be considered true, as both urine and blood pregnancy tests are reliable methods for detecting pregnancy. These tests work by identifying the presence of the hormone hCG (human chorionic gonadotropin), which is produced after a fertilized egg attaches to the wall of a woman's uterus.
A urine pregnancy test is typically a lateral flow test, which may include a control line and a test line. A result is considered positive if both the control line and the test line appear. For instance, in the context provided, if a blue band forms on the control line and no band forms on the test line, the result is a negative test for pregnancy.
Additionally, in regards to the fetal development, the statement "A fetus can produce urine" is true. Moreover, the umbilical artery actually carries deoxygenated blood from the fetus to the placenta, not oxygenated blood to the fetus; hence, the statement about the umbilical artery is false.