Hello; Thanks for your query. Since your wife has conceived just a week back and having loose motions in pregnancy it should never be taken lightly.It can lead to dehydration and malabsorption of food, both of which can affect the developing fetus. Severe diarrhea in the first trimester can cause spontaneous abortion. Loose motions is caused by bacteria, viruses, or parasites, which usually gain entry into the body due to the consumption of contaminated water or food. Hence she should drink purified water, eat well-cooked food, and wash hands before and after every meal Knowing the cause of diarrhea during pregnancy is important.Therefore, she should be investigated by her Gynaecologist to find out the cause of loose motions and she will give the necessary treatment. I would advice her to drink an oral rehydration solution at regular intervals to prevent dehydration and electrolyte imbalances. A mixture of banana in curds can help to control the loose motions naturally. Foods made of maida such as white bread can help to bind the stools. Non-vegetarian food should also be completely restricted Take care. Regards