This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.

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i) Causes of bleeding in early pregnancy • Implantation bleeding: Light spotting as the fertilized egg implants in the uterus. • Miscarriage (spontaneous abortion): Loss of pregnancy before 20 weeks. • Ectopic pregnancy: Fertilized egg implants outside the uterus, usually in a fallopian tube. • Molar pregnancy: Abnormal growth of tissue in the uterus. • Cervical polyps or infection: Non-pregnancy related causes of bleeding from the cervix. • Subchorionic hemorrhage: Bleeding between the chorion and the uterine wall.
ii) Management of bleeding in early pregnancy • Medical history and physical examination: To assess symptoms and determine the source of bleeding. • Ultrasound: To confirm pregnancy location, viability, and rule out ectopic or molar pregnancy. • Blood tests: Quantitative hCG levels, blood type, Rh status, and complete blood count (CBC). • Rh immunoglobulin (RhoGAM): Administered to Rh-negative mothers to prevent Rh sensitization. • Expectant management: For minor bleeding like implantation bleeding or small subchorionic hematomas. • Surgical or medical intervention: For ectopic pregnancy (e.g., methotrexate, laparoscopy) or incomplete miscarriage (e.g., D&C, misoprostol).
iii) Causes of bleeding in late pregnancy • Placenta previa: The placenta partially or completely covers the cervix. • Placental abruption: The placenta separates prematurely from the uterine wall. • Vasa previa: Fetal blood vessels cross or run near the internal opening of the cervix. • Uterine rupture: A tear in the uterine wall, often in women with previous C-sections. • Preterm labor: Cervical changes and contractions leading to early delivery. • Bloody show: Mucus plug mixed with blood, indicating cervical changes before labor.
iv) Management of bleeding in late pregnancy • Immediate assessment: Monitor maternal vital signs and fetal heart rate. • Avoid vaginal examination: Until placenta previa is ruled out by ultrasound. • Ultrasound: To determine placental location, assess for abruption, and evaluate fetal well-being. • Blood tests: CBC, coagulation profile, blood type, Rh status, and cross-match. • Hospitalization: For close monitoring and potential intervention. • Fluid resuscitation/blood transfusion: If significant blood loss occurs. • Tocolytics: Medications to stop contractions if preterm labor is suspected and delaying delivery is safe. • Corticosteroids: Administered to promote fetal lung maturity if preterm delivery is likely. • Delivery: May be necessary depending on the cause, severity of bleeding, and fetal status.
v) Diagnostic procedures that clarify bleeding in each case, be it early or late pregnancy • History and Physical Examination: Detailed history of bleeding characteristics (onset, amount, color, associated pain) and a speculum examination to visualize the cervix. Digital vaginal examination is contraindicated in late pregnancy bleeding until placenta previa is ruled out. • Ultrasound (Transvaginal and/or Transabdominal): • Early pregnancy: Confirms intrauterine pregnancy, fetal viability, gestational age, and rules out ectopic or molar pregnancy. • Late pregnancy: Determines placental location (ruling out placenta previa), assesses for placental abruption, and evaluates fetal well-being. • Blood Tests: • Quantitative hCG: In early pregnancy, to monitor pregnancy progression. • Complete Blood Count (CBC): To assess for anemia. • Blood Type and Rh Status: Essential for Rh-negative mothers. • Coagulation Profile: In late pregnancy, to assess for coagulopathy, especially with suspected abruption. • Fetal Monitoring: • Late pregnancy: Cardiotocography (CTG) to assess fetal heart rate patterns and uterine contractions for signs of fetal distress.
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This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.