Table 3

Secondary outcomes

EnoxaparinPlaceboP
Adverse events 
 N 138 118  
 Congenital abnormality*, n (%) 7 (5) 3 (2.5) .35 
 Major bleeding, n (%) 2 (1.4) 2 (1.7) 
  Blood transfusion, n  
  Fall in hemoglobin level ≥20g/L, n  
 Minor bleeding, n (%) 33 (23.9) 17 (14.4) .06 
  Bruising, n (%) 11 (7.9) 4 (3.4) .18 
  Nosebleed, n (%) 10 (7.2) 5 (4.2) .3 
  Bleeding gums, n (%) 3 (2.2) 2 (1.7) 
  Minor vaginal bleeding, n (%) 9 (6.5) 6 (5) .63 
 Severe skin reaction at the injection site, n (%) 1 (0.7) 0 (0) 
 Thrombocytopenia, n (%) 4 (2.9) 3 (2.5) 
Pregnancy outcomes before 20 weeks 
 N 138 118  
 Miscarriage, n (%) 42 (30.4) 28 (23.7) .26 
  Miscarriage ≥ 10 wk, n  
  Gestational age at miscarriage, wk (mean [SD]) 8.2 (1.97) 8.5 (2.8) .6 
 Medically indicated termination of pregnancy§, n (%) 2 (1.4) 1 (0.8) 
 Ectopic pregnancy, n (%) 2 (1.4) 1 (0.8) 
Outcomes of ongoing pregnancies after 20 weeks 
 N 92 88  
 Intrauterine fetal death, n (%) 0 (0) 1 (1.1) 
 Medically-indicated termination of pregnancy§, n (%) 0 (0) 1 (1.1) 
 Preeclampsia, n (%) 6 (6.5) 2 (2.3) .28 
 Placental abruption, n (%) 0 (0) 0 (0) 
 Small for gestational age (<10th percentile), n (%) 1 (1) 3 (3.4) .36 
 Premature delivery, n (%) 7 (7.6) 7 (7.9) 
  ≥24 to <28 weeks, n  
  ≥28 to < 32 weeks, n  
  ≥32 to < 37 weeks, n  
 Multiple gestation, n (%) 1 (1) 0 (0) 
Outcomes of pregnancies with live birth 
 N 92 86  
 Birth weight, g (mean [SD]) 3283 (554) 3142 (537) .09 
 Gestation time at delivery, weeks (mean [SD]) 39.3 (2.2) 38.9 (2.3) .24 
EnoxaparinPlaceboP
Adverse events 
 N 138 118  
 Congenital abnormality*, n (%) 7 (5) 3 (2.5) .35 
 Major bleeding, n (%) 2 (1.4) 2 (1.7) 
  Blood transfusion, n  
  Fall in hemoglobin level ≥20g/L, n  
 Minor bleeding, n (%) 33 (23.9) 17 (14.4) .06 
  Bruising, n (%) 11 (7.9) 4 (3.4) .18 
  Nosebleed, n (%) 10 (7.2) 5 (4.2) .3 
  Bleeding gums, n (%) 3 (2.2) 2 (1.7) 
  Minor vaginal bleeding, n (%) 9 (6.5) 6 (5) .63 
 Severe skin reaction at the injection site, n (%) 1 (0.7) 0 (0) 
 Thrombocytopenia, n (%) 4 (2.9) 3 (2.5) 
Pregnancy outcomes before 20 weeks 
 N 138 118  
 Miscarriage, n (%) 42 (30.4) 28 (23.7) .26 
  Miscarriage ≥ 10 wk, n  
  Gestational age at miscarriage, wk (mean [SD]) 8.2 (1.97) 8.5 (2.8) .6 
 Medically indicated termination of pregnancy§, n (%) 2 (1.4) 1 (0.8) 
 Ectopic pregnancy, n (%) 2 (1.4) 1 (0.8) 
Outcomes of ongoing pregnancies after 20 weeks 
 N 92 88  
 Intrauterine fetal death, n (%) 0 (0) 1 (1.1) 
 Medically-indicated termination of pregnancy§, n (%) 0 (0) 1 (1.1) 
 Preeclampsia, n (%) 6 (6.5) 2 (2.3) .28 
 Placental abruption, n (%) 0 (0) 0 (0) 
 Small for gestational age (<10th percentile), n (%) 1 (1) 3 (3.4) .36 
 Premature delivery, n (%) 7 (7.6) 7 (7.9) 
  ≥24 to <28 weeks, n  
  ≥28 to < 32 weeks, n  
  ≥32 to < 37 weeks, n  
 Multiple gestation, n (%) 1 (1) 0 (0) 
Outcomes of pregnancies with live birth 
 N 92 86  
 Birth weight, g (mean [SD]) 3283 (554) 3142 (537) .09 
 Gestation time at delivery, weeks (mean [SD]) 39.3 (2.2) 38.9 (2.3) .24 
*

Placebo group: 1 arthrogryposis, 1 polymalformative syndrome, and 1 hydronephrosis. Enoxaparin group: 1 trisomy 21, 1 polymalformative syndrome, 1 neonatal epilepsy, 1 interventricular communication, 1 hairless line, 1 congenital nevus, 1 ear lobe anomaly.

The injections were stopped for 10 or more days when hemorrhage occurred.

Maternal thrombocytopenia was defined as a platelet count <0.6× baseline platelet count or as a platelet count <100 000/mm3. No heparin-induced thrombocytopenia was observed.

§

Medically-indicated termination of pregnancy as a result of a congenital abnormality cited in the first footnote.

One missing data.

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