Table 1. The study population.

	Number of serum drug concentration analyses			Number of pregnancies	Number of women
	During pregnancy	First twelve weeks following delivery	At baseline
Escitalopram	110	3	161	97	95
Citalopram	78	3	80	58	58
Fluoxetine	53	2	49	43a	41
Sertraline	56	5	52	37	34
Venlafaxine	36	1	44	33a	33
Paroxetine	29	6	31	20	19
Fluvoxamine	5	2	3	3	3
Total	367	22	420	290a	281a,b,c

^a In one pregnancy both fluoxetine and venlafaxine were analyzed (at different times) due to change in medication.

^b One woman used paroxetine in one pregnancy and fluoxetine in another.

^c Nine women were pregnant twice.