Let me first help you understand how the menstrual cycle works in terms of simple words.
The process know as "OVULATION" is when the female egg releases from OVARY, this occurs roughly between the 14 th -19 th day after the menstrual cycle (end of bleeding ), pregnancy
means the meet in of the man's SPERM to the female's OVA- both have half genes which need to get together in order to form a complete structure, so the best possibility for the pregnancy is if the intercourse has occurred during those five days, other time their is no OVA present to meet the sperms hence no possibility of getting pregnant.
NOW answer OF your question is "YES" during those 5 days period when female "OVA" is set free.
1) To check a pregnancy their are pregnancy test kit is available - its a kind of stick where you have to simply urinate on the stick as instructed in the instruction manual and the test will 90% correct in saying deciding the pregnancy is present or not ( test will work after 10 days of pregnancy occurs the earliest way to detect and do not involve any doctors help can be use at home ).
2) Missing a period/ menses will indirectly hint towards pregnancy.
3) Second way to know to do ULTRASONOGRAPHY
but it will pick the pregnancy after 1-2 months stage.
Hope it helps.