Sperms test. What do you recommend?

In May 2022, me and my wife decided to have a kid. At the end of Jun 2022, my wife was pregnant. However, after a couple of weeks she had a miscarriage. After a break of more than a year, we started trying again from Sep-Oct 2023. She is in constant touch with her gynec and diagnosed with thyroid and hormonal imbalances and irregular menstruation cycles. Her doctors adviced her to lose weight also. She is 90+ kgs with 5'5" height. Now someone advised her to also get my paternity test.  I am fine for the test but knowing that she was pregnant when we tried for the first time, I am not sure if it will help. We live in Germany now and therefore wanted to test it there for convenience and easy follow-ups. But my wife is insisting me to get it tested in India while we are on vacation. Based on the medical history, what do you recommend?