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Marcus Welby, M.D.: Echo of a Baby's Laugh

The Grahams have traveled nearly 2000 miles to California, chasing a dream of a better life. Mary Ann is pregnant, and due very soon. Fortunately for them, Dr. Welby periodically stops by the trailer park where they stop to care for the residents who are too infirm to visit his office. He advises the Grahams that they are Rh incompatible - she is negative, while her husband is positive. This is not a problem during the first pregnancy, but can be lethal to the second and subsequent children. Fortunately, this is Mary Ann's first pregnancy. Or, is it? Dr. Welby must get the truth from her so that he and the hospital can prepare for the birth correctly.

Episode Info

Episode number: 1x6
Production Number: 30818
Airdate: Tuesday October 28th, 1969

Director: John Erman
Writer: Max Hodge

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Guest Stars
Peggy Rea
As Mrs. Barker
Shirley O'Hara
As Nurse
Amy Douglass
As Grandmother
Arthur Peterson
As Dubie Newton
Belinda Montgomery
As Mary Ann Graham
Nora Marlowe
As Belle Newton
Richard Thomas
As Dennis Alan Graham
Main Cast
Robert Young
As Dr. Marcus Welby
James Brolin
As Dr. Steven Kiley
Episode Notes
Rhesus incompatibility causes a hemolytic anemia in newborns. When incompatible parents have a child, that child may be Rh positive. If his mother is Rh negative, the small quantity of fetal blood that passes the placental barrier can causes the mother to produce antibodies to the Rh factor (usually the D factor, the most common). This typically happens near or during childbirth, which is why the first child is safe most of the time. During subsequent pregnancies, these antibodies pass into the fetal blood, and if the baby is positive they attack and destroy its erythrocytes (red blood cells), causing severe anemia with cascading complications up to and including death. The problem can be forestalled by injecting the mother of anti-Rh immunoglobulin. This compound finds and destroys fetal Rh+ elements before the mother's immune system can detect them, preventing her from becoming sensitized (producing the antibodies). Treatment of an affected newborn ranges from observation (in very mild cases) to full blood transfusion in severe cases. Depending on how long the anemia persisted in utero, babies may be miscarried or may be born with severe deficits. At the time this episode was filmed, immunoglobulin therapy was relatively new. It is now routine for all pregnancies, given around 28 weeks.

Warning: Marcus Welby, M.D. season 1 episode 6 guide may contain spoilers
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