Female Anatomy: Vagina and External Genitalia
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Questions and Answers

Which structure is covered with pubic hair and formed by a mass of fatty subcutaneous tissue?

  • Clitoris
  • Mons Pubis (correct)
  • Labia Majora
  • Labia Minora
  • What type of epithelium is found in the mucosa of the structure described?

  • Cuboidal epithelium
  • Pseudostratified columnar epithelium
  • Simple squamous epithelium
  • Stratified squamous non-keratinized epithelium (correct)
  • Which structure consists of erectile tissue and forms part of the female external genitalia?

  • Labia Majora
  • Vaginal Orifice
  • Clitoris (correct)
  • Mons Pubis
  • Which lymph nodes are involved in the lymphatic drainage of the female external genitalia?

    <p>Iliac, sacral, aortic, and inguinal lymph nodes</p> Signup and view all the answers

    What arteries primarily supply the inferior regions of the female reproductive structures?

    <p>Vaginal and internal pudendal arteries</p> Signup and view all the answers

    What hormone levels return to non-pregnant levels approximately 7 days postpartum?

    <p>Oestrogen and progesterone</p> Signup and view all the answers

    What is the estimated weight of the uterus at 6-8 weeks postpartum?

    <p>70 g</p> Signup and view all the answers

    Which type of lochia is characterized by a blood red color and lasts for the first four days after birth?

    <p>Lochia rubra</p> Signup and view all the answers

    What is the typical mean weight loss associated with the delivery of the baby, amniotic fluid, and placenta?

    <p>Approximately 4 kg</p> Signup and view all the answers

    At what level is the fundus of the uterus located on the 10th day postpartum?

    <p>At the level of the small pelvis</p> Signup and view all the answers

    What is the purpose of the combined test performed between 11-13 weeks of pregnancy?

    <p>To measure nuchal translucency and blood markers</p> Signup and view all the answers

    Which of the following is NOT a component measured in the triple or quadruple tests performed at 16 weeks?

    <p>PAPP-A</p> Signup and view all the answers

    What is the main advantage of cell-free fetal DNA testing?

    <p>It can identify chromosomal abnormalities non-invasively.</p> Signup and view all the answers

    Which condition is indicated by a nuchal translucency (NT) measurement greater than 4mm?

    <p>Trisomy 21 (Down's syndrome)</p> Signup and view all the answers

    What hormonal changes signify the onset of labor?

    <p>Increased prostaglandin synthesis and activation of fetal-adrenal axis</p> Signup and view all the answers

    What is the gold standard for confirming chromosomal abnormalities during pregnancy?

    <p>Amniocentesis with fetal karyotyping</p> Signup and view all the answers

    Which of the following statements about pre-labor signs is true?

    <p>Lightening involves the fetus dropping into the pelvis weeks before labor.</p> Signup and view all the answers

    What is the typical frequency and duration of uterine contractions once labor is established?

    <p>Every 2-4 minutes for 45-60 seconds</p> Signup and view all the answers

    What is the primary focus of antenatal appointments during the second trimester at 16 weeks?

    <p>Discussing screening results</p> Signup and view all the answers

    Which of the following is considered a medical factor related to high maternal risk?

    <p>Multiple pregnancy</p> Signup and view all the answers

    What is a potential fetal risk factor that could lead to unfavorable perinatal outcomes?

    <p>Congenital anomalies</p> Signup and view all the answers

    Why is it important to identify high risk pregnancies?

    <p>To ensure adequate pregnancy follow up and prevent complications</p> Signup and view all the answers

    Which method is NOT typically used for the diagnosis of high risk pregnancies?

    <p>Routine blood test for infections</p> Signup and view all the answers

    Which medication is used to sensitize the uterus to prostaglandins prior to termination of pregnancy?

    <p>Mifepristone</p> Signup and view all the answers

    What is the primary risk associated with dilatation and evacuation after 13 weeks of gestation?

    <p>Significant bleeding</p> Signup and view all the answers

    Which of these is NOT a differential diagnosis for bleeding in the first trimester?

    <p>Placenta previa</p> Signup and view all the answers

    What is the legal limit for termination of pregnancy in the UK?

    <p>24 weeks</p> Signup and view all the answers

    What is the recommended antibiotic regime to prevent infection after termination of pregnancy?

    <p>Metronidazole 1g + doxycycline 100mg PO for 7 days</p> Signup and view all the answers

    Which option describes the medical management of a non-viable miscarriage?

    <p>Vaginal or oral misoprostol</p> Signup and view all the answers

    What complication is NOT commonly associated with termination of pregnancy?

    <p>Increased fertility</p> Signup and view all the answers

    What is the main purpose of cervical preparation before surgical termination of pregnancy?

    <p>Facilitating easier dilation of the cervix</p> Signup and view all the answers

    Study Notes

    Female Anatomy: Vagina

    • Parts: Anterior and posterior.
    • Histology: Mucosa (folded, stratified squamous non-keratinized epithelium, lamina propria); Muscularis (inner circular, outer longitudinal layers); Tunica spongiosa.
    • Arterial Supply: Superior – uterine artery branches; Middle and inferior – vaginal and internal pudendal arteries (internal iliac artery branches).
    • Venous Drainage: Vaginal venous plexus to uterine veins to internal iliac veins.
    • Lymphatic Drainage: Iliac, sacral, aortic, and inguinal lymph nodes.
    • Innervation: Uterovaginal plexus.

    Female External Genitalia

    • Mons Pubis: Fatty eminence anterior to pubic symphysis, covered in pubic hair.
    • Labia Majora: Skin folds protecting urethral and vaginal orifices, extending from mons pubis to anus; contain loose subcutaneous tissue, smooth muscle, and round ligament termination; covered in pubic hair; form anterior and posterior commissures.
    • Labia Minora: Hairless skin folds surrounding the vestibule; contain erectile tissue; medial laminae form clitoral frenulum; lateral laminae form clitoral prepuce; posterior portion forms the frenulum of the labia minora.
    • Clitoris: Located where labia minora meet anteriorly; consists of root, body (corpora cavernosa), and glans; solely for sexual arousal.
    • Vestibule: Space surrounded by labia minora, containing external urethral and vaginal orifices, and ducts of greater/lesser vestibular glands (mucus secretion during arousal).

    Prenatal Screening & Diagnosis

    • Combined Test (11-13+6 weeks): Ultrasound (nuchal translucency measurement) + blood test (PAPP-A, hCG).
    • Triple/Quadruple Tests (16 weeks): Dating scan + blood test (oestriol, hCG, AFP, inhibin A [quadruple only]).
    • Cell-Free Fetal DNA Testing (10 weeks onwards): Fetal DNA isolated from maternal blood for genetic testing; identifies chromosomal aberrations and fetal sex.
    • Invasive Testing: Chorionic villus sampling (10-13 weeks), amniocentesis (15-18 weeks), followed by fetal karyotyping (gold standard).

    Chromosomal Abnormalities & Screening Markers

    • Trisomy 21 (Down Syndrome): Increased nuchal translucency, low PAPP-A, high free β-hCG.
    • Trisomy 18 (Edwards Syndrome): Increased nuchal translucency, low PAPP-A, low free β-hCG.
    • Trisomy 13 (Patau Syndrome): Increased nuchal translucency, low PAPP-A, low free β-hCG.
    • Turner Syndrome (45, XO): Note: Specific screening markers not detailed.
    • Klinefelter Syndrome (47, XXY): Note: Specific screening markers not detailed.

    Onset of Labor & Stages of Labor

    • Onset: Endocrine maternal/fetal cross-talk, controlled by the fetus; hormonal changes include increased prostaglandin synthesis, myometrial gap junction formation, and myometrial oxytocin. Activation of the fetal-hypothalamic-pituitary-adrenal axis initiates labor. Signs include lightening (mother feels lighter in abdomen).
    • Established Labor: Uterine contractions lasting 45-60 seconds every 2-4 minutes.

    Normal Puerperium & Postpartum Care

    • Puerperium: Period from delivery to approximately 6 weeks postpartum. Hormonal changes include rapid decline in human placental lactogen and β-hCG; estrogen and progesterone return to non-pregnant levels within 7 days postpartum; menstrual flow returns after 6 weeks.
    • Uterine Involution: Weight reduces from 1000g at birth to 70g at 6-8 weeks; fundus at navel level on day 1, pelvic level by day 10.
    • Lochia: Uterine discharge (endometrial cells, necrotic tissue, blood, serum, lymph): Lochia rubra (red, first 4 days), lochia serosa (brown-red, watery, 2-3 weeks), lochia alba (yellow-white, 1-2 weeks).
    • Treatment of Postpartum Hemorrhage: Buscolysin, Oxytocin, Methergine.
    • Weight Loss: Significant weight loss after delivery of baby, amniotic fluid, and placenta.

    Antenatal Care & High-Risk Pregnancy

    • Antenatal Appointment Schedule: Specific details for second trimester appointment at 16 weeks (screening results discussion, hemoglobin level investigation).
    • Factors Associated with High Maternal Risk: Parity, lack of prenatal care, distance to hospital, pre-pregnancy diabetes, hypertension, endocrine/CVD/neurological/renal/pulmonary/autoimmune disorders, multiple pregnancy, high BMI, previous cesarean section, uterine scar, obstetric complications in previous pregnancies/deliveries.
    • Fetal Risk Factors for Unfavorable Perinatal Outcome: Congenital anomalies (termination of pregnancy may be an option, prenatal screening and diagnosis necessary), preterm delivery, IUGR (increased perinatal mortality, neonatal adaptation problems, chronic pulmonary disease), intrauterine infections (HIV/AIDS, CMV, syphilis), birth trauma (adequate delivery assessment, shoulder dystocia management, emergency cesarean section access), Rh sensitization (anti-D immune globulin).
    • Reasons for Identifying High-Risk Pregnancies: Eliminate risk factors, ensure adequate follow-up, prevent complications (e.g., preeclampsia – aspirin, maternal/fetal follow-up, delivery at 37 weeks), determine timing, place, and mode of delivery.
    • High-Risk Pregnancy Identification Methods: Past obstetric history, detailed family history, physical/gynecological exam, adequate pregnancy follow-up.
    • Diagnostic Methods: Ultrasound (3D and Doppler), prenatal screening, invasive prenatal testing, NIPT, cardiotocography (CTG), biophysical profile (BPP).

    Postpartum Hemorrhage Management

    • Ergometrine (to contract uterus, if non-viable pregnancy).
    • Intravenous antibiotics if fever present.
    • Anti-D for Rh-negative women.

    Miscarriage Management

    • Non-Viable Miscarriage: Medical management (vaginal/oral prostaglandin [misoprostol], repeat pregnancy test); surgical management (removal of products of conception with anesthetic, vacuum aspiration).
    • Differential Diagnosis (1st-trimester bleeding): Ectopic pregnancy, hydatidiform mole, cervical polyps, cervicitis, neoplasm.

    Artificial Abortion (Termination of Pregnancy - TOP)

    • Definition: Methods for terminating unwanted pregnancy; legal limit of 24 weeks in the UK.
    • Surgical Methods: <7 weeks (conventional suction termination should be avoided), 7-13 weeks (conventional suction termination), >13 weeks (dilation and evacuation after cervical preparation). Higher gestational age increases risks of bleeding, incomplete evacuation, perforation. Cervical preparation (misoprostol 400mcg PV 3 hrs prior, gemeprost 1mg PV 3 hrs prior, or mifepristone 600mg PO 36-48 hrs prior) reduces cervical dilation difficulty, especially for patients >10 weeks.
    • Medical Methods: Used up to 20 weeks.
    • Medications: Mifepristone (antiprogesterone, given 24-48 hours prior, causes uterine contractions, bleeding, and prostaglandin sensitization); Misoprostol (prostaglandin E1 analogue, stimulates uterine contractions); Gemeprost (prostaglandin E1 analogue, softens and dilates cervix before surgical TOP in the first trimester and for therapeutic TOP in the second trimester).
    • Management Before TOP: Counseling/support, blood tests (Hb, blood group, antibodies), ultrasound scan, infection prevention (antibiotic regimens – metronidazole 1g + doxycycline 100mg PO for 7 days; metronidazole 1g PR + azithromycin 1g PO)
    • Management After TOP: Anti-D to all Rh-negative women, follow-up within 2 weeks.
    • Complications of TOP: Significant bleeding, genital tract infection, uterine perforation, uterine rupture, cervical trauma, failed TOP, retained products of conception, nausea/vomiting/diarrhea (due to prostaglandins), psychological sequelae (short-term anxiety and depressed mood).

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    Description

    Explore the intricate details of female anatomy, focusing on the vagina and external genitalia. This quiz covers the structure, histology, arterial supply, venous drainage, and innervation of these vital areas. Test your knowledge on the components that contribute to female reproductive health.

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