Should Allylestrenol 5mg Be Used In Pregnancy?

Hello sir. Good day . I am ferdusi from bangladesh. 30 yrs old. Height 5 ft. Weight 55 kg. I am pregnent from last 8 weeks. Doctor suggested me to take allylestrenol 5mg which i used to take b4 pregnency also. After trying 3yrs i conceived. I m married for 3 yrs. Should i take this med pls adv. Thanks.