Table 2 Effect of paternal age on different sperm parameters
Type of study | Age grouping | Effects on sperm parameters | Reference | |||
|---|---|---|---|---|---|---|
Concentration | Morphology | Motility | Ejaculate volume | |||
Prospective | 24-76 | ↑ | ↓ | ↓ | ↓ | [4] |
22-80 | ↓ | - | ↓ | ↓ | [46] | |
22-80 | - | - | ↓ | - | [50] | |
All CASA parameters of motility except amplitude of lateral head displacement and beat cross frequency | ||||||
30-50 | - | ↓ | ↓ | ↓ | [40] | |
Retrospective | 25-55 | - | - | ↓ | ↓ | [41] |
Prospective | Not specific | - | Not measured | ↓ | ↓ | [42] |