Kelly said she agreed with the Australian Medical Association (AMA) which has called for the ban to be overturned.
"It's up to the female and her doctor to make the decision as to when to call it a day," Kelly told Australian Broadcasting Corporation Radio.
The trouble started when the NA board said on Monday it had endorsed a recommendation from its president Sue Taylor to conduct an open forum on the issue of pregnancy and sport, with an emphasis on contact and collision sports.
An NA statement read: "As an interim measure, the board of Netball Australia has adopted a policy to ban pregnant players from participating in on-court activities.
"Under no circumstance should it be seen that we are discouraging pregnant women from participating in exercise during their pregnancy," it added.
NA officials have said they want to consider "the legal ramifications" of any possible problems that might be suffered by pregnant women playing their sport.
Kelly said NA should have waited until receiving the results of the forum before making a final decision on a ban.
"Next thing, they'll be talking about banning pregnant women from walking on a public beach, or working in an office," the Australian newspaper quoted AMA vice-president Trevor Mudge as saying this week.
Dr Margaret Torode of Sports Medicine Australia said the ban sent a negative message to all pregnant women playing sport.
"Pregnancy is not an illness and limited contact sports like netball and tennis are considered safe in the first trimester... depending on the fitness of the mother," Dr Torode was quoted as saying in The Australian.
Australia's Human Rights and Equal Opportunity Commission (HREOC) added its concern.
"While some players may have particular health reasons that restrict their participation, a blanket ban may unfairly discriminate against some women," it said in a statement.
"There are many examples of women playing netball at the highest levels while pregnant," it added.
Basketball Australia and the Women's National Basketball League (WNBL) have backed the NA's call for an inquiry into the issue of pregnant players and elite level sport.
Australian Sports Minister Jackie Kelly joined critics on Wednesday in attacking Netball Australia (NA) for announcing a ban on pregnant players.






