Here are the events that resulted in changes in Mary's body from the day she met her boyfriend: Sexual Intercourse and Fertilization: After meeting her boyfriend and spending time with him, Mary likely engaged in unprotected sexual intercourse. This led to the release of sperm into her reproductive tract. If this occurred during her fertile window, one of the sperm could have fertilized an egg released from her ovary, forming a zygote*. Implantation and Pregnancy: The zygote would then travel down the fallopian tube to the uterus, where it implanted into the uterine wall. This event marks the beginning of pregnancy. Upon implantation, her body began producing the hormone Human Chorionic Gonadotropin (HCG)*. Early Pregnancy Symptoms: As the pregnancy progressed, the rising levels of hormones, particularly HCG and progesterone, caused her to experience symptoms like nausea and vomiting* (commonly known as morning sickness), which she described as feeling "sickly and vomiting" months later. Other early symptoms could include fatigue and breast tenderness. HCG Test Confirmation: The HCG urine test conducted by her parents detected the presence of the HCG hormone in her urine. A positive HCG test* is a definitive indicator of pregnancy, confirming that she was indeed pregnant. Lack of Antenatal Care: Mary's continued habits and failure to attend antenatal care* (prenatal care) meant she did not receive crucial medical monitoring and advice. This could lead to several risks for her body and the developing fetus, such as: Increased risk of complications during pregnancy (e.g., anemia, pre-eclampsia, gestational diabetes). Lack of nutritional guidance, potentially affecting her health and fetal development. Failure to detect and manage potential health issues for both mother and baby early on. Increased risk of complications during childbirth due to lack of preparation and monitoring.