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Assignment questions
NursingCase studyPediatric nursing

Developmental markers for a nine-month-old case

The three percentiles are not decoration. Length and head circumference at the 25th with weight at the 5th is a discordant pattern, and a post that assesses milestones without noticing it has missed the case.

Editorial process

Last reviewed · August 15, 2026

01

The percentiles are the case — read them before answering

Read the numbers before answering the question. The infant is at the 25th percentile for length, the 25th for head circumference, and the 5th for weight. Any single low percentile can be constitutional, but the pattern here is discordant — weight lagging while length and head circumference track together — and that pattern is what a nurse is meant to notice. It is the classic shape of inadequate caloric intake rather than of a genetic growth pattern, in which all three would sit low together. None of this means something is wrong, because a single set of measurements is a point rather than a trajectory and the growth chart's whole purpose is to be read serially. But the post that mentions the discordance and asks for previous measurements is immediately doing clinical reasoning rather than reciting milestones, and that shift is visible to a marker within the first two sentences.

For the developmental markers themselves, be systematic across domains rather than listing whatever comes to mind: gross motor, fine motor, language and communication, social and emotional, and cognitive. At nine months the expected picture includes sitting without support, transferring objects and beginning a pincer grasp, babbling with consonant sounds, responding to their own name, stranger awareness, and looking for a partially hidden object. Use the current checklists rather than remembered ones, since the milestone criteria were substantially revised in 2022 and older textbooks disagree with them. Then tie the recommendations to the feeding picture the percentiles suggest — complementary feeding, iron-rich foods, responsive feeding, avoiding juice — and justify each as evidence-based by naming the guideline it comes from, which is the third part of the question and the one most often left as an assertion. Naming Bright Futures or a specific recommendation converts it into evidence.

Likely learning objectives

Inferred from the brief — check these against your own rubric.

  • 01
    Interpret a set of growth percentiles as a pattern rather than as three separate values.
  • 02
    Assess developmental markers systematically across all domains at nine months.
  • 03
    Justify anticipatory guidance by reference to a named guideline.
Assignment instructionsQuoted verbatim

Read the full question

Review every instruction before using the planning guidance that follows.

A mother comes in with 9-month-old girl. The infant is 68.5cm in length (25th percentile per CDC growth chart), weighs 6.75kg (5th percentile per CDC growth chart), and has a head circumference of 43cm (25th percentile per CDC growth chart). Describe the developmental markers a nurse should assess for a 9-month-old female infant. Discuss the recommendations you would give the mother. Explain why these recommendations are based on evidence-based practice.
Course-wide instructions that accompany this question

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes. Discussion: Developmental markers Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages. 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One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words. I encourage you to incorporate the readings from the week (as applicable) into your responses. Weekly Participation Your initial responses to the mandatory DQ do not count toward participation and are graded separately. In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies. Participation posts do not require a scholarly source/citation (unless you cite someone else’s work). Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week. APA Format and Writing Quality Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required). Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation. I highly recommend using the APA Publication Manual, 6th edition. Use of Direct Quotes I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly. As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content. It is best to paraphrase content and cite your source. LopesWrite Policy For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me. Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes. Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own? Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score. Late Policy The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies. Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances. If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect. I do not accept assignments that are two or more weeks late unless we have worked out an extension. As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading. Communication Communication is so very important. There are multiple ways to communicate with me: Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class. Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours. Discussion: Developmental markers

02

Turn the brief into deliverables

  1. 01
    Developmental markers covering every domain for a nine-month-old.
  2. 02
    An interpretation of the discordant growth pattern.
  3. 03
    Recommendations for the mother, tied to the feeding picture.
  4. 04
    An evidence-based justification naming guidelines, in APA format.
03

Markers, then guidance, then the evidence behind it

01

Read the growth pattern

Interpret the three percentiles together and identify the discordance.

02

Ask what is missing

Note that one measurement is a point and request the serial data and feeding history.

03

Assess markers by domain

Cover gross motor, fine motor, language, social-emotional and cognitive expectations at nine months.

04

Recommendations to the mother

Give anticipatory guidance on complementary feeding, iron, responsive feeding and safety.

05

Justify as evidence-based

Name the guideline or evidence behind each recommendation.

04

Current milestone checklists and growth standards

Recommended databases

  • CDC developmental milestones
  • American Academy of Pediatrics Bright Futures
  • WHO growth standards
  • CINAHL
  • PubMed

Search sequence

  1. 1.
    Use the current CDC milestone checklists, which were revised in 2022 and differ from older textbook lists.
  2. 2.
    Check which growth chart applies at this age, since WHO standards are recommended under two years in the US.
  3. 3.
    Use Bright Futures for the anticipatory guidance content, which gives you the evidence base directly.
  4. 4.
    Search for evidence on responsive feeding and iron requirements at nine months for the justification section.
05

Reference shortlist

These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.

Nothing here is cleared for citation until you have read it.

  1. 01

    CDC's Developmental Milestones

    Centers for Disease Control and Prevention · 2024

    The revised milestone checklists including the by-9-months list, and the AAP screening schedule at 9, 18 and 30 months that makes this visit a screening point.

  2. 02

    About Adverse Childhood Experiences

    Centers for Disease Control and Prevention · 2024

    Context for assessing the family environment alongside the growth data, since feeding difficulty rarely has a purely nutritional cause.

  3. 03

    About Breastfeeding Data

    Centers for Disease Control and Prevention · 2024

    Feeding practice data at this age, relevant to the complementary feeding recommendations and their national context.

  4. 04

    Hypothesis Testing, P Values, Confidence Intervals, and Significance

    StatPearls, NCBI Bookshelf · 2023

    Explains what a percentile does and does not mean, which is the interpretive skill this case is testing.

06

Review before submission

Common mistakes

  • Listing milestones without interpreting the percentiles at all.
  • Treating the weight percentile in isolation rather than as part of a pattern.
  • Using pre-2022 milestone criteria, which no longer match the current checklists.
  • Asserting that recommendations are evidence-based without naming the evidence.

Submission checklist

  • Have you noticed and explained the discordance between the percentiles?
  • Are markers covered across all developmental domains?
  • Do the recommendations connect to what the growth pattern suggests?
  • Is each recommendation traced to a named guideline?

Use this guide to plan and review your own work. Follow your institution's rules and read our academic-integrity policy.

Written by

Aaron Bishop

MA, Education

assignment interpretation and research-methods coaching across disciplines

Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.

Reviewed by

Dr. Nathan Cole

PhD, Rhetoric & Composition

Argumentation and thesis development

Nathan teaches first-year composition and directs a university writing center. He reviews EssayCrackers guides for argumentative soundness and citation accuracy.

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