Rh-Isoimmunization in a Primigravida Skydiver
Bibliographic record
Abstract
There is a paucity of data on risks of skydiving while pregnant. Although the American College of Obstetricians and Gynecologists states to avoid the activity in pregnancy, women may underestimate potential complications from it and may continue to skydive while pregnant or may do so inadvertently if unaware of their pregnancy. We present a unique case of a primigravida who completed 100 jumps at 10,000 feet throughout her gestation, as she was unaware of her pregnant state, associated with Rh-isoimmunization presumably from chronic placental abruption. A 20-year-old Caucasian female presented to an urgent care center for abdominal cramping thought to be secondary to constipation. A urine pregnancy test was performed due to irregular menstruation history. Although the patient denied being pregnant, urine chorionic gonadotrophic hormone testing was positive with physical examination suggesting 32 - 34 weeks of gestation. The patient was a professional skydiving photographer with 100 logged jumps from the start of her pregnancy (by estimated gestational age calculation). She stated irregular vaginal bleeding every 4 - 6 weeks throughout the time of pregnancy, which she interpreted as her menstruation. Her abdominal discomforts were diagnosed as active labor, and she progressed to preterm delivery at 34 weeks (gestational age assigned to the newborn at delivery based on neonatal assessment). Port-wine-stained amniotic fluid was noted at the time of spontaneous membrane rupture suspicious for chronic abruption. The patient was Rh negative and found to possess anti-D antibody, confirming Rh sensitization. Placental histology revealed a placental mass of 438 g, retroplacental adherent fibrin deposition with placental parenchymal compression. A 40% parenchymal infarct was present. Skydiving while pregnant poses several risks to the maternal-fetal unit. Rapid deceleration from parachute canopy deployment and/or repeated impact from landing(s) may lead to placental abruption (acute or chronic). This can result in Rh-isoimmunization in the susceptible patient, and preterm birth. In cases of massive or repeated abruption events, fetal death may be a potential outcome. Beyond the rarity and novel nature of habitual skydiving while pregnant, this case underscores the need for increased access to contraceptive agents, especially for those persons with physical risk-taking behaviors. J Clin Gynecol Obstet.2023;12(1):15-18 doi: https://doi.org/10.14740/jcgo845
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.009 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".