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Table 1 Definitions of pre-pregnancy complications and uncomplicated pre-pregnancy

From: Pre-pregnancy complications - associated factors and wellbeing in early pregnancy: a Swedish cohort study

  

Total cohort (n = 5330)

Uncomplicated (n = 4188)

Pre-pregnancy complications (n = 1142)

n

%

n

%

n

%

Number of previous early miscarriages

0

3672

68.9

3100

74.0

572

50.1

 

1–2

1438

27.0

1088

26.0

350

30.6

 

≥ 3

220

4.1

0

0.0

220

19.3

Previous late miscarriages (after week 16) or IUFD

Yes

96

1.8

0

0.0

96

8.4

 

No

5234

98.2

4188

100.0

1046

91.6

Method of conception

Uncomplicated

4850

91.0

4187

100.0

663

58.1

 

In vitro fertilization (IVF)

307

5.8

2

0.0

305

26.7

 

Intracytoplasmic sperm injection (ICSI)

98

1.8

2

0.0

96

8.4

 

Insemination

53

1.0

3

0.1

50

4.4

 

Medically or surgically assisted

138

2.6

23

0.5

100

8.8

Time to pregnancy

< 6 months

3835

72.0

3601

86.0

234

20.5

 

6–12 months

642

12.0

536

12.8

106

9.3

 

>= 12 months

790

14.8

0

0.0

790

69.2

 

Missing

63

1.2

51

1.2

12

1.1

  1. IUFD, Intrauterine fetal demise