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Factors affecting the outcome

What are the factors that influence the outcome of IVF treatment?

The success of IVF treatment depends on several factors.

The chance of an individul couple of having a baby following one completed cycle of IVF treatment depends on two main factors. Firstly, the overall success rate of the treatment clinic (centre) and secondly, the characteristics of couple seeking treatment.

The overall live birth rate per treatment cycle is rising steadily by approximately 1% a year. Each age group has experienced significant increases in success rates.

Age	1996	1997	1998
Less than 35	28.4%	30.7%	32.2%
35-37	23.4%	25.4%	26.1%
38-40	16%	17%	17.9%
Over 40	6.4%	7.3%	8.3%

Data adapted from the SART report 2002

Age	1989-1999	1999-2000	2000-2001
Less than 38	22.1%	23.6%	25.1%
All ages	19.5%	20.7%	21.8%

Data adapted from the HFEA patient reports 2000 and 2002

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Last updated: Tue, 22 Apr 2008 - 16:45:01
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