Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.

Input: Consider Input: Abstract: Human granulosa-luteal cell production of cyclic adenosine 3',5'-monophosphate (cAMP) and progesterone (P) were studied in response to purified human chorionic gonadotropin (hCG) in cultured cells from hyperstimulated follicles of in vitro fertilized patients. The hCG injection given to the patients 36 hours before laparoscopy caused partial desensitization of adenylate cyclase of these cells to gonadotropins. Preincubation of the cells in hormone free medium for 2 to 3 days significantly increased their cAMP responsiveness to hCG. P production was stimulated initially by hCG and showed no desensitization. In the cells preincubated for 72 hours without hCG, a subsequent stimulus of 50 ng/ml of hCG elicited maximal cAMP response, whereas 1 ng/ml of hCG was sufficient to bring about maximal P secretion. Time-course studies indicated that maximal cAMP response to hCG was obtained in 1 to 3 hours. Both basal and hCG-stimulated P accumulation continued to rise for up to 24 hours. Preincubation of granulosa-luteal cells from hyperstimulated follicles improves the cells' cAMP responsiveness to hCG, whereas P response remains unaltered.

Output: Adenosine Cyclic Monophosphate

Input: Consider Input: Abstract: A retrospective study was undertaken to determine whether the Denver Developmental Screening Test (DDST) language sector is a sensitive screen of speech and language development. Seventy-one children between 18 and 66 months of age with suspected developmental problems were referred to screening clinics conducted by a child evaluation team. Each child was screened using the DDST (revised) and another screening measure of speech and language development. Statistically significant differences were found between the DDST language sector and the speech-language screening in identification of expressive language and articulation problems. No significant difference was found with receptive language. The DDST failed to identify more than one half of the children with expressive language and/or articulation problems. These results demonstrate that the DDST may fail to identify children with speech and language impairment. Professionals involved in developmental screening need to be advised of alternative speech and language screening measures.

Output: Child

Input: Consider Input: Abstract: Available facial tissue thickness standards for facial feature reconstruction are based on adult measurements. Mid-facial tissue thicknesses for male and female white adolescents are presented here. Measurements were taken from lateral radiographs produced in an orthodontic practice. Statistical analysis indicates that age, sex, and to some extent, dental occlusion pattern are factors that should be taken into account when attempting facial feature reconstructions.
Output: Adolescence