Infertility and spontaneous abortion

The observed proportion of planned pregnancies leading to birth conceived in ≤ 6 or in ≥ 12 months according to the father's and the mother's age

 

Percentage of couples conceiving within specified time interval (months)
  No. of couples 6 12
Father's age (years)
≤ 24

643

77.1

91.9
25-29

2692

78.4

91.3
30-34

2809

73.8

87.5
35-39

1153

68.6

83.3
≥ 40

573

66.3

81.3
Total n

7870

 

 
Mother's age (years)
≤ 24

1625

76.4

90.2
25-29

3663

75.9

90.0
30-34

2466

73.8

86.5
35-39

680

62.8

80.6
≥ 40

81

59.3

75.3
Total n

8515

 

 

Ford WC, North K, Taylor H, Farrow A, Hull MG, Golding J. Increasing paternal age is associated with delayed conception in a large population of fertile couples: evidence for declining fecundity in older men. The ALSPAC Study Team (Avon Longitudinal Study of Pregnancy and Childhood). Hum Reprod. 2000 Aug;15(8):1703-8.

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Edited by Aldo Campana,