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Net income per ordinary share
 6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Net income per ordinary share Net income per ordinary share
Basic net income per ordinary share attributable to the Group has been computed by dividing net income available to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period.

Diluted net income per ordinary share is computed by adjusting the weighted average number of ordinary shares outstanding during the period for all potentially dilutive ordinary shares outstanding during the period and adjusting net income for any changes in income or loss that would result from the conversion of such potential ordinary shares.

There is no difference in net income used for basic and diluted net income per ordinary share.

Basic and diluted net income per ordinary share attributable to the Group includes the adjustment to reflect the accretion of the noncontrolling interest in MeDiNova to its redemption value.

The reconciliation of the number of shares used in the computation of basic and diluted net income per ordinary share is as follows:
Three Months EndedSix Months Ended
June 30, 2021June 30, 2020June 30, 2021June 30, 2020
Weighted average number of ordinary shares outstanding for basic net income per ordinary share52,909,368 52,570,104 52,860,414 52,959,229 
Effect of dilutive share options outstanding472,133 458,463 434,021 731,909 
Weighted average number of ordinary shares outstanding for diluted net income per ordinary share53,381,501 53,028,567 53,294,435 53,691,138 
    
The reconciliation of net income attributable to the Group and net income attributable to the Group (including NCI redemption amount) as used to calculate net income per ordinary share attributable to the Group is as follows:

Three Months EndedSix Months Ended
June 30, 2021June 30, 2020June 30, 2021June 30, 2020
(in thousands)(in thousands)
Net income attributable to the Group$73,865 $47,760 $170,987 $139,456 
Noncontrolling interest adjustment to redemption amount— — — (4,522)
Net income attributable to the Group (including NCI redemption adjustment)$73,865 $47,760 $170,987 $134,934 
Three Months EndedSix Months Ended
June 30, 2021June 30, 2020June 30, 2021June 30, 2020
Net income per Ordinary Share attributable to the Group (including NCI redemption adjustment):
Basic$1.40 $0.91 $3.23 $2.55 
Diluted$1.38 $0.90 $3.21 $2.51