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Resources Centre / Twins Tips Introduction / Twins Tips / Multiple Birth Statistics 2005 (UK) - Twins. Triplets & Quads
Multiple Birth Statistics 2005 (UK) - Twins. Triplets & Quads
UK Multiple Birth Statistics for 2005 (compiled from the Office of National Statistics. General Registry Office Scotland and GRO Northern Ireland).

The number of twins being born in the continues to rise. with a total of 10.533 sets being born in 2005. the latest year for which statistics are available. There has been a slight increase in the actual numbers of all multiple births in the from 10.623 to10.694 but the overall birth rate has also increased in a similar way leaving the multiple birth rate constant.

Although in 2004 the number of triplets born in and rose to 163 sets. this increase has not continued (146 sets in 2005). It would be expected that this rate would fall following the national guidelines from the HFEA that recommend that only two embryos are replaced during IVF conceptions in women under 40 years. Indeed there is much discussion amongst infertility experts about the benefits of single embryo transfer (SET) and it remains to be seen what impact any move towards this will have on the multiple birth statistics.

Scotland has the highest rate of multiple pregnancies. with 1.58% of maternities resulting in a multiple birth - this is a record high for . whilst the chances of having multiples in is currently lower than it has been over the past 6 years.

These statistics mean that 1 in 67 pregnancies is a multiple pregnancy and 1 in 33 children born in 2005. is a multiple. The latest figures also highlight that multiples are more frequently born to older mothers - 62% of twins and 67% of triplets are born to women aged 30 years+. compared to 48% of singletons.

Total number of maternities = 715.556
Multiple Births = 10.694 (sets) - 14.94/1000 maternities
Twins = 10.533 - 14.72/1000 maternities
Triplets = 159 - 0.22/1000 maternities
Quads = 2
No higher order births for 2005.

The twinning rate varies with the age of the mother. From 6.3 in under 20 years old. rising to 21.7 in 35-39 years. and 56.7 in the over 45s (compared to 6.3 in mothers over 45 years in 1980).

Multiple Births (MB) in the United Kingdom

2000

2001

2002

2003

2004

2005

Total Maternities

672.459

662.608

661.603

689.131

709.316

715.556

Twins

9.578

9.590

9.740

10.115

10.455

10.533

Triplets

285

235

194

140

163

159

Quads

5

5

4

3

5

2





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