David Ovulation Predictor Kit

allow you to predict, with great accuracy, your most fertile time of the month. Easy to use, OPKs can greatly increase your chances of becoming pregnant - if you use them correctly.

Please refer to the table below for information on when to start using ovulation tests:

Your cycle length Start to test on

21 days Day 6

22 days Day 6

23 days Day 7

24 days Day 7

25 days Day 8

26 days Day 9

27 days Day 10

28 days Day 11

29 days Day 12

30 days Day 13

31 days Day 14

32 days Day 15

33 days Day 16

34 days Day 17

35 days Day 18

36 days Day 19

37 days Day 20

38 days Day 21

Instruction:

URINE COLLECTION

1. Do not use first morning urine samples as LH is synthesized in your body early in the morning. It will not show up in your urine until later in the day.

2. The best time to collect your urine is between 10am - 8pm.

3. Collect urine at about the same time each day.

4. Reduce liquid intake about 2 hours before collecting your urine as a diluted urine sample can prevent the test from detecting LH surge. Observation on the OPK result within 10 minutes, result after 30 minutes was invalid.

5. the OPK insertion depth of not more than MAX mark line. 

Authorization Letter from Vendor

Instruction