. 2015 Jun 25;15:140. doi: 10.1186/s12884-015-0555-7

Table 1.

Assessment index of the adequacy of prenatal care use in the Dutch primary care context (A.W. Boerleider and E.I. Feijen-de Jong)

Duration of gestation (completed weeks and days of pregnancy, respectively)	Initiation of care	Number of visits	Kotelchuck Index
0-11+6¹	≤11⁺⁶	≥3	4
		1–2	3
			2
		0	1
12-26⁺⁶	≤11⁺⁶	≥6	4
Ideally 3.75 visits¹		3–5	3
		2	2
		≤1	1
	≥12⁺⁰		1
27-36⁺⁶		≥10	4
Ideally 7.5 visits¹		6–9	3
		4–5	2
		≤3	1
	≥12⁺⁰		1
37-37⁺⁶	≤11⁺⁶	≥13	4
Ideally 11 visits¹		10–12	3
		6–9	2
		≤5	1
	≥12⁺⁰		1
38-38⁺⁶	≤11⁺⁶	≥14	4
Ideally 12 visits¹		10–13	3
		6–9	2
		≤5	1
	≥12⁺⁰		1
39-39⁺⁶	≤11⁺⁶	≥15	4
Ideally 13 visits¹		11–14	3
		7–10	2
		≤6	1
	≥12⁺⁰		1
40-40⁺⁶	≤11⁺⁶	≥16	4
Ideally 14 visits¹		12–15	3
		7–11	2
		≤6	1
	≥12⁺⁰		1
41-41⁺⁶	≤11⁺⁶	≥17	4
Ideally 15 visits¹		12–16	3
		8–11	2
		≤7	1
	≥12⁺⁰		1

1. Inadequate (received less than 50 % of expected visits)

2. Intermediate (50–79 %)

3. Adequate (80–109 %)

4. Adequate Plus (110 % and more)

¹According to the guidelines of the Royal Dutch Organization of Midwives