{"id":"W4240647713","doi":"10.1016/s0140-6736(03)14237-7","title":"Twinning","year":2003,"lang":"en","type":"review","venue":"The Lancet","topic":"Assisted Reproductive Technology and Twin Pregnancy","field":"Medicine","cited_by":596,"is_retracted":false,"has_abstract":false,"ca_institutions":"British Columbia Children's Hospital","funders":"","keywords":"Crystal twinning; Monozygotic twin; Pregnancy; Twin Pregnancy; Dizygotic twin; Singleton; In utero; Obstetrics; Dizygotic twins; Reproductive technology; Assisted reproductive technology; Medicine; Ovulation; Fetus; Biology; Twin study; Infertility; Genetics; Chemistry","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0007138304,0.000579123,0.001069175,0.001651955,0.0005063552,0.0008582302,0.0004758478,0.001231711,0.007963117],"category_scores_gemma":[0.002377805,0.0002577293,0.0003893863,0.001299584,0.0008671944,0.0008995343,0.001618879,0.001619525,0.001721252],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0003663111,"about_ca_system_score_gemma":0.001359348,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0009182522,"about_ca_topic_score_gemma":0.002176021,"domain_scores_codex":[0.9996587,0.0001065204,0.00004807867,0.00005277449,0.000105054,0.00002886626],"domain_scores_gemma":[0.9996552,0.0001874609,0.00005468576,0.00002934928,0.0000396553,0.00003358249],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"design_other","study_design_gemma":"not_applicable","study_design_scores_codex":[0.0001205706,0.00002396759,0.0004814652,0.004894982,0.00006106788,0.001481369,0.000181712,0.0001460155,0.0009334079,0.0109157,0.04253814,0.9382216],"study_design_scores_gemma":[0.00006195343,0.00009450437,0.001403231,0.004641245,0.0001380138,0.01569179,0.0001567569,0.0000746561,0.0007259417,0.004891752,0.9721052,0.00001484305],"study_design_candidate":"not_applicable","study_design_consensus":null,"genre_codex":"review","genre_gemma":"review","genre_scores_codex":[0.0005832803,0.986459,0.0007617607,0.001427781,0.002261496,0.00001408467,0.00001972729,0.00001487323,0.008457991],"genre_scores_gemma":[0.009306183,0.9741448,0.001256898,0.001934906,0.001798786,0.00003694683,0.00007234741,0.00001024296,0.01143893],"genre_candidate":"review","genre_consensus":"review","teacher_disagreement_score":0.007963117,"threshold_uncertainty_score":0,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1349328149617812,"score_gpt":0.3887106686545219,"score_spread":0.2537778536927407,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}