Northwestern University

3D-printed ovaries allowed infertile mice to give birth to pups, a new study reports.

Why it matters: Scientists are focused on creating artificial ovaries in order to restore fertility in women who are sterile due to cancer treatment or disease.

Key point: A supply of healthy ovarian cells is needed to seed the artificial organ — researchers are investigating whether stem cells can be coaxed into ovarian cells in the lab. Further research is also needed to determine whether the 3D-printed structure will work with larger, human ovarian follicles.

Northwestern University researchers 3D-printed a scaffold of biodegradable gelatin then seeded it with ovarian follicles containing immature egg cells. They then removed one ovary from mice and implanted the artificial organ. Previous approaches have been reported but by 3D printing the structural base of the ovary, the researchers were able to get the three main types of ovarian cells to take to the structure. The ovary then connected to surrounding blood vessels, a key to it functioning in the body, and released eggs. The mice mated as normal and three of the seven gave birth to babies that came from eggs ovulated from the implant. The mice fed from lactating mothers, grew up and either gave birth to their own mice or sired offspring.

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Updated 1 min ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 12:15 p.m. ET: 21,261,598 — Total deaths: 767,054— Total recoveries: 13,284,647Map.
  2. U.S.: Total confirmed cases as of 12:15 p.m. ET: 5,324,930 — Total deaths: 168,703 — Total recoveries: 1,796,326 — Total tests: 65,676,624Map.
  3. Health: The coronavirus-connected heart ailment that could lead to sudden death in athletes — Patients grow more open with their health data during pandemic.
  4. States: New York to reopen gyms, bowling alleys, museums.
  5. Business: How small businesses got stiffed — Unemployment starts moving in the right direction.
  6. Politics: Biden signals fall strategy with new ads.

Kamala Harris and the political rise of America's Indian community

Vice presidential hopeful Sen. Kamala Harris (D-Calif.) Photo: Drew Angerer/Getty Images

When Democrats next week formally nominate the daughter of an Indian immigrant to be vice president, it'll be perhaps the biggest leap yet in the Indian American community's rapid ascent into a powerful political force.

Why it matters: Indian Americans are one of the fastest-growing, wealthiest and most educated demographic groups in the U.S. Politicians work harder every year to woo them. And in Kamala Harris, they'll be represented in a major-party presidential campaign for the first time.

5 hours ago - Health

The cardiac threat coronavirus poses to athletes

Illustration: Annelise Capossela/Axios

Cardiologists are increasingly concerned that coronavirus infections could cause heart complications that lead to sudden cardiac death in athletes.

Why it matters: Even if just a tiny percentage of COVID-19 cases lead to major cardiac conditions, the sheer scope of the pandemic raises the risk for those who regularly conduct the toughest physical activity — including amateurs who might be less aware of the danger.