Perspectives on the design and methodology of periconceptional nutrient supplementation trials

Table 5 Estimated annual numbers of births by differential age and parity (P1, P2, P3) fertility rates

Population of women of child-bearing age (n) ^a	15 – 19 yrs			20 – 24 yrs			25 – 29 yrs			30 – 34 yrs			35 – 40 yrs
	Fertility rates			Fertility rates			Fertility rates			Fertility rates			Fertility rates
	P1	P2	P3	P1	P2	P3	P1	P2	P3	P1	P2	P3	P1	P2	P3
	54.6	23.5	8.2	76.2	75.4	53.0	37.2	52.7	64.8	15.0	24.5	34.5	3.2	5.8	14.8
1,000	55	24	8	76	75	53	37	53	65	15	24	35	3	6	15
2,000	110	48	16	152	150	106	74	106	130	30	48	70	6	12	30
3,000	165	72	24	228	225	159	111	159	195	45	72	105	9	18	45
4,000	220	96	32	304	300	212	148	212	260	60	120	140	12	24	60
5,000	275	120	40	380	375	265	185	265	325	75	144	175	15	30	75

ISSN: 1745-6215