My fianc hasnt had her period it is 10 days late but she hasnt shown any signs of pregnancy nor has she had increased urination or anything of the sort, shes had a uti recently and just finished school, what could cause the late period?

Some women who are usually very predictable can skip a cycle occasionally. The amount of delay is unpredictable and there are no real symptoms other than the delay & negative pregnancy tests. If it goes past two months with a negative pregnancy test many OBGYNs would offer meds to bring on a menses. By that point it would usually be quite heavy.

clinical symptoms of pregnancy occur later than 10 days. There can be numerous causes for this Best is to have a pregnancy test or/ and see her doc

If she had sex since her last period, she should take a home prgnancy test. Use first morning urine and follow instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex : https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines Get HPV vaccine.