Hello doctor, My wife delivered a baby boy 4...

is it possible to be pregnant in this case ?
- if you have sexual intercourse then female have normal period : its not possible 
- if you have sexual intercourse then female missed her period : yes its possible 
* if she missed her period without previous sexual intercourse , then thats normal as well because females may face period irrgularties after pregnancy and delivery in first 6 months 
What are the options of pregnancy tests ?
1. HCG hormone level blood test
2. home pregnancy test ( urine ) 
3. ultrasound test ( in clinic ) 
How early can you do those tests :
1. HCG hormone test : 25th day of the current period
2. home pregnancy test : first week of the next period 
3. ultrasound test : second week of the next period 
Early pregnancy signs :
1. delayed period 
2. increase vigainal discharge 
3. abodiminal discomfort 
4. change in mood status