As these fertility examinations do not come cheap, I'd suggest you go for it only if:
1. you have regular period cycles of 28 days
2. been trying for at least 6 months with no success
even if you're regular in your period, but as long as it's not the 28 days cycle, it could mean something else. My friend's is a regular but on a 31 days cycle and she's diagnosed with PCOS which may affect success rate at conception.
So if you satisfy the above 2 conditions, consult a fertility specialist, otherwise, you gotta consult an ob-gyn for further advice.
All the best!
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