negligence. If expert testimony supports the claim that this stress during pregnancy was proximately caused by PIW’s and English-El’s negligent mishandling of the transference phenomenon, then Morgan should be able to recover damages for such stress and the consequential cost of related treatment.
Finally, PIW contends that its motion for directed verdict on Morgan’s claims of damages for past lost wages and cost of medical treatment should have been granted, because the amount of lost wages was speculative and the medical treatment was not proximately caused by PEW’S conduct. As PIW notes in its brief, damages may not be based on mere speculation or guesswork. Romer v. District of Columbia, 449 A.2d 1097, 1100 (D.C.1982). At the same time, a party is not required to prove damages to a degree of mathematical certainty, Designers of Georgetown, Inc. v. E.C. Keys & Sons, 436 A.2d 1280, 1281 (D.C.1981), but must instead offer some evidence which allows the trier of fact to make a reasoned judgment. Edmund J. Flynn Co. v. LaVay, 431 A.2d 543, 549-50 (D.C.1981).
We find sufficient evidence in the record to allow the jury to make a reasoned judgment regarding damages of Morgan’s past lost wages. Morgan testified that she worked as an analyst for Ford Motor Company from August of 1986 until August of 1987, earning a yearly salary of $30,000. Morgan was unemployed from August, 1987 to November, 1987, but was again employed from December, 1987 until December, 1989, by a different program within Ford Motor Company earning $32,500 a year. Morgan testified that, during 1990, 1991, and 1992, after her participation in the PIW program and her relationship with English-El, she held various jobs earning between seven and ten dollars an hour, but did not stay at a job for any length of time. Morgan sought to recover $20,500 in past lost wages, the difference between the amount of money she made while at Ford Motor Company before her admission into the PIW program and the amount earned afterward during 1990, 1991, and 1992. On the record before us, we conclude that a reasonable juror could make an award for past lost wages, without engaging in mere speculation or guesswork.
PIW also contends that Morgan failed to prove that medical expenses claimed as damages were proximately caused by its conduct, and should have therefore been denied. Morgan was seeking to recover $22,-600 for medical expenses related to therapy undertaken after her pregnancy for depression, eating disorders and neurosis. It is well settled that, in order to prevail in a medical malpractice action, “the plaintiff must prove, generally through expert testimony, that there was an applicable standard of care, that the defendant breached that standard, and that the breach was a proximate cause of the plaintiffs injuries.” Carmichael v. Carmichael, 597 A.2d 1326, 1329 (D.C.1991) (citing Psychiatric Inst. of Washington v. Allen, 509 A.2d 619, 623-24 (D.C.1986)).
Contrary to PIW’s position, Morgan provided expert testimony that PIW and English-El’s negligent conduct was the proximate cause of her medical expenses. Dr. Ryan, a qualified medical expert, was asked on direct examination if he had an opinion to a reasonable degree of medical certainty as to what caused Morgan’s depression, eating disorder, and neurosis. Dr. Ryan testified that Morgan’s emotional conditions were caused by her relationship with English-El. Specifically, Dr. Ryan stated “not simply the relationship but the way it developed, the fact it developed when she was in a treatment center and she had a problem with addiction, that she had gone there to get help with, and she fell in love with one of the staff members there. And it had a terrible outcome for her.” In addition, another expert, Dr. Afield, testified that in her opinion Morgan was severely depressed and had post-traumatic syndrome which reflected that Morgan was traumatized by the relationship with her counselor, English-El. We conclude that this expert testimony would support a jury finding that the alleged breach was a proximate cause of Morgan’s injuries requiring medical treatment.
In summary, we conclude that Morgan has presented evidence of physical injury sufficient to overcome summary judgment on her