MEDICAL test is done once for extension of visit. in the case that within 6months before you transfer it to husband sponsorship, it may require another medical test.

Babies and children under 16 years do not go for medical tests.

For the procedures, submit all birth, marriage certificates which are authenticated by ministry of foreign affairs(red ribbon)from your country attested by your embassy and further attested by QATAR ministry of foreign affairs.

Other than that, salary certificate, NOC from your company for the residence visa of your family, bank statement, rent or accomodation contract with the landlord OR OWNER of the accomodation ID.

basic salary requirement for the sponsor: 10,000.

hope this helps.

when everything ready, just go to the immigration department and inquire the rest there.

BEST of luck:)